Salam and Peace!
This is a matter of Authorization from Allah. I hope we know what the terminology "Authorization from Allah" means.
Read and see what does Allah mean by "Authorization from Allah":
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"They are not but (mere) names which you have named, you and your forefathers, Allah has sent down no Authority for that. They follow not except a guess and that which (they) themselves desire. Although, surely there has come to them Guidance from their Lord." (Al-Najam-23)Allah authorized a human being as His Last Prophet. So, we have Faith in it that Muhammad (SAW) is the last Prophet of Allah.
Allah certified the companions of the last Prophet as rightly guided and blessed. So, we have Faith in it.
First of all, we have Iman in Allah, that is why we have Iman in everything that Allah Authorized.
For example, Allah issued an Authorized Order for the Angels to bow before Adam. Because the angels had Faith in Allah, that is why they immediately bowed before Adam. But Iblees refused to accept the Authorized Order of Allah and didn't bow, and was cursed forever.-----So the thing that matters, is what Allah authorized. Bowing is only to Allah, but the angels bowed before Adam because Allah authorized this act.
So, Authorization from Allah. Where is the Authorization from Allah for anything that we claim. And if there is no Authorization from Allah, then it is a guesswork.
Allah didn't Authorize Umar bin Khattaab as His Prophet. So, the ummah will never accept Umar bin Khattaab as a Prophet.
-----Imam Bukhari, Imam Muslim, etc. were not Authorized and Certified by Allah to compile books of the Messenger's sayings.-----Then how can their books of ahadith for which Allah never Revealed any Authorization, be Authorized, Trustworthy and a Source of Deen?
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"They are not but (mere) names which you have named, you and your forefathers, Allah has sent down no Authority for that. They follow not except a guess and that which (they) themselves desire. Although, surely there has come to them Guidance from their Lord." (Al-Najam-23)Did Allah Authorize in His Exalted Quran, the words "Sihah Sittah", "Sahih Al-Bukhari", "Sahih Al-Muslim", "Ahlul Sunnah Wal Jamah", "Salafee", etc, etc???-----No, not at all.---Then who authorized Imam Bukhari to do which the Messenger himself never did, and which his rightly guided Companions never dared to do.
Yes, although there has come to us The Guidance (Authorized Al-Quran only) from our Lord, but still, we don't verify from The Quran what our millions of big-ones of the ummah issue as Deen.
If someone clearly refuses to accept Imam Bukhari and his book as "Authorized Source of Deen", what would you say?---On what ground would you issue a fatawah against him?---What Authority from Allah do you have to call him a "kafir" or "out of Islam"?---"They follow not except a guess and that which (they) themselves desire"---If we don't have any Authorization from Allah's Quran, then it is merely a guesswork, and nothing but a guesswork, no matter how many millions and millions of big scholars of past and present support it.
Man, in spite of all his hallmark achievements, is nothing but an absolute zero. Finally, into the dust to become dust.
All those millions and millions of scholars, past and present, died and will die, and will become earth into the earth, and they will be raised again and questioned about what they said and did.
Is it wise,---Is it wise,---again, Is it wise to obey those who will be questioned---Or---Is it wise to obey The One, Who will question???
Is it wise to obey those who are given---Or---Is it wise to obey The One, Who gives???
Is it wise to obey those who are being watched---Or---Is it wise to obey The One, Who is watching and writing???
In all ages, uncertified people have always passed on "uncertified things" as Deen. Those unathorized people have always put forward unauthorized sayings as the source of Deen. And people who are fearless of Allah's Strong Hold, have always put their faith in those uncertified things as a source of Deen.
Just imagine, Imam Bukhari never saw, met and talked to the Messenger, and as such he couldn't. Yet he claimed to compile the sayings of the Messenger which he never heard with his own ears from the Messenger. And that Unauthorized compilation is claimed and accepted by millions of scholars and the ummah as the explanation of The Authorized Quran.
Unauthorized explanations of An Authorized Quran!!!
Unauthorized books of Unauthorized Imams.-----Allah's Quran does not Certifies and Authorizes Imam Bukhari, Imam Muslim and such people.
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You say man-made books of ahadith are not Unauthorized.----Okay! If they are not unauthorized, then who Authorized them?-----Where in Al-Quran it says that, alongwith Al-Quran, the ummah have to follow the extra-Quranic sayings of the Messenger?!!
((1))---You say in Al-Quran, Allah has ordered us to obey the Messenger, and you say that following Al-Bukhari and Sihah Sittah are the obedience to the Messenger.-----Did Allah Authorize Sahih Al-Bukhari as the Obedience to the Messenger?---No!---Then what is the Clear Authority in favour of this claim? If there is no Divine Authority from Allah, then this is nothing but mere conjecture-----We should fear Allah!
((2))---You say man-made books of ahadith are Al-Hikmah. Who said this?---Did Allah say this?---No!---Then this is nothing but mere conjecture.-----We should fear Allah!
((3))---It is said that the extra-Quranic sayings of the Messenger are "Hidden Wahee".-----Did Allah Authorize that extra-Quranic sayings of the Messenger are "Hidden Wahee"

Now read and contemplate:
((1))-----Allah, in His Safe, Holy and Exalted Quran has ordered us to obey the Messenger, and not the Prophet. Where ever Allah ordered us to obey the Messenger in The Quran, Allah used the word "Messenger", and not "Prophet". A Messenger is always with The Message. It clearly means that we have to obey the Messenger by obeying The Message.
Allah has never ordered us to follow the extra-Quranic sayings of the Messenger.
-----"Follow (O mankind) that which has been sent down to you from your Lord, and do not follow besides Him any awliyah (their books). Little it is you remember." (Al-Aaraaf-3)-----
It is very much clear form the above verse---and do not follow besides Him any awliyah ---means follow Allah, and following Allah means follow what Allah has sent down, that is Al-Quraan only.-----And following any awliyah means following their written or compiled books. So, it is forbidden because it is shirk.
So, Allah ordered to obey the Messenger. And also Allah ordered to follow "The Message".-----So, obeying the Messenger, and following The Message, are the same thing.-----Obey the Messenger by following The Message that he brought.
Doesn't this directly go into the mind (intellect) and then into the heart?-----Peep into your heart, and you will find The Truth there.
((2))---Allah is Hakeem. His Book is Al-Hikmah.
Allah is The Most Wise. His Book is The Wisdom.
The Messenger himself took The Wisdom from Allah's Quran, and taught to others.
((3))---Nowhere in The Quran, Allah said the extra-Quranic sayings of the Messenger is "Hidden Wahee".
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The Message is more important than the Messenger. That is why the Messenger passed away, but The Message remains with the ummah. But the ummah have forgotten The Message, and is after the Messenger's sayings, and the Messenger is not with them.-----Isn't it so?---Say-----"Yes it so!"
The Messenger was given the designation of "The Messenger". So he was and is, the Messenger, in his life and also after his death.-----But if the Messenger had been given the designation of "The Explainer of Al-Quran", then Allah would have kept him alive until Al-Qiyamah to explain The Quran for the ummah.---But we know that the Messenger is no more with the ummah after his death. Now who will explain Al-Quran for them?---In fact, Allah's Quran is for the mankind, and It is Self-explanatory. Because there is no need of an explainer of a Self-explanatory Quran, that is why Allah called the Messenger back, and let His Exalted and easy-to-understand Quran with the ummah.
Indeed, until the Messenger was alive, no one was better than him to explain The Message. He used to explain Al-Quran from within Al-Quran. Now the Messenger is no more with us.-----Okay! You read The Quran, and you will understand everything. There is no need of Sahih Al-Bukhari, any tafseer or teacher.
The Messenger is the Messenger for his ummah and the mankind until Al-Qiyamah. But he was an explainer of Al-Quran for the Sahaba.-----After the Messenger's death, the Sahaba themselves contemplated in Al-Quran and solved their problems and ran their matters.
And if the Messenger is the Explainer of Al-Quran for the ummah until Al-Qiyamah, then where is the Messenger? He is not with the ummah, because he has died. And the books which Imam Bukhari and Imam Muslim compiled using the name of the Messenger, can never be the replacement of the Messenger, because the Messenger himself never narrated those ahadith to Imam Bukhari. Even Imam Bukhari heard the ahadith form someone who himself never heard the Messenger narrating his ahadith.
Allah didn't send down any Verse to Authorize Imam Bukhari's work as "The Second Source of Deen".-----And the Messenger never put his "Signature of Attestation" or never put his "Seal of Authorization" on Imam Bukhari's book.-------Unauthorized books of Unauthorized Imams.
Now, call your intellect and think for a moment, the Sahaba took Guidance from Al-Quran in their own specific environment, surroundings and the things they used. We will never find aero planes, computers, machines, space technology, etc. in their times. Now we are in a different environment with different things to use, so we will take Guidance from Allah's Quran in accordance with our needs.
Indeed, the matter of "Faith in Allah", and "Behaviourism" is the same for all times, and these matters are discussed to the last detail in Allah's Quran. Rest of the things are related to the environments in which people of different times live.-----If we try to look and implement those specific applications of Quran that was applied at the time of Sahaba, we will be perplexed. We have to implement Al-Quran in our own surroundings and environments.
Allah will not question us about the old days, horses, donkeys, swords, etc. Allah will question us about the applications of Al-Quran in our times, environment, things, computers, space technology, modern equipments and their usage.
The Messenger and his rightly guided Sahaba set an example of taking Guidance from Allah's Quran in their times and environment, and the specific things they used.
Now it is up to us to set an example of taking Guidance from Allah's Quran according to our own time, environment, and the specific things that we use.
Remember, the Specific environment and Specific things that people use, in their times, create specific problems for them. And their problems may not be the problems for next generations.-----Sahaba rode horses, camels, donkeys, but we don't.----We travel on motor bikes, trains, and aero planes, but Sahaba didn't.
Now, since, Allah's Quran is A Guidance for all times, places and environments, so all the generations will take Guidance from Allah's Quran to solve their problems and settle their matters that exist in their environments.
Did you see, time, environment and things, change-----but Allah's Guidance (Al-Quran) remains unchanged. This is The Proof that Allah's Quran is Supreme over all times and all environments.
The people of the ummah who were without Sahih Al-Bukhari, they were The Super Power of their time (Sahaba only). Weren't they?---Yes, they were.-----And today the ummah is with Sahih Al-Bukhari, and they are the slaves of the non-muslims. Beggars at their doors.----Haram sects. Fighting with each other. Humiliation, Downfall, Terrorism, Mysticism, Corrupt Rulers and Misguided Religious Scholars---Why???-----Because the ummah today have no love for "The Only Certified and Authorized Source of Deen, Al-Quran."
The ummah, 200 years after the death of the Messenger, have found for themselves another quran.
Read and contemplate:
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"And when Our Verses are recited to them as clear Evidence, those who hope not for their meeting with Us, say: ?Bring a quran other than this (Quran), or make changes in this (Quran).? Say (O Messenger): ?It is not for me to change It on my own accord. I follow not but that which is revealed unto me. Indeed, I fear, if I were to disobey my Lord, the punishment of a Great Day.? (Younus:15)So, the liars couldn't stand the Straight, Clear and Easy-to-understand Instructions of Allah's Quran. They demanded---?Bring a quran other than this (Quran), or make changes in this (Quran)."---The Messenger refused and said---?It is not for me to change It (Allah's Quran) on my own accord. I follow not but that which is revealed unto me. Indeed, I fear, if I were to disobey my Lord, the punishment of a Great Day.?---
And look, ---what the Messenger never did, ---and what the rightly guided Sahaba never did,-----it is the Persian Imam Bukhari and Persian Imam Muslim who did it. And the ummah and their scholars fall on it like flies fall on sweets.
And to make it more impressive, they claimed that Sahih Al-Bukhari and Sahih Al-Muslim are from Allah (Hidden Revelation).
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"Then woe be to those who write the Scripture (man-made books of shariah, ahadith) with their own hands, then they say, ?This is from Allah, (they say man-made books of ahadith are also Wahee, means from Allah)? that they may sell it for a small price. Woe be to them for that which their hands have written, and woe be to them for that which they earn." (Al-Buqarah-79)Big Imaams, allaamas, scholars and leaders fabricated a big Lie, and declared from their own desire, that unauthorized man-made books of ahadith Bukhari, Muslim and others are The Second Source of Islaam. What they said and still say, is not authorized by a Divine Authority from Allah. And anything which is not approved by Allah, is nothing but Lie, Fabrication and Sorcery (Jadoo, Magic).
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"Those who do not believe in Allah's Verses, only they invent falsehood. And it is they, who are the liars." (Al-Nahl-105)-----
"Woe unto each sinful liar." (Al-Jasia-7)-----"The Quraan is not a fabricated Hadith but a confirmation of what has existed before it, and a detailed explanation of everything, and A Guidance, and A Mercy for the people who believe." (Yousuf-111)
Allah is confirming, that His Quraan is not a fabricated hadith, whereas, Allah didn't confirm Imaam Bukhari, Imaam Muslim or other man-made books of ahadith that they are not fabricated. And when Allah is saying that His Quraan is not fabricated, then only Allah's Quraan is not fabricated. Else are, for sure, fabricated.
There are many examples in The Quraan, where Allah gave His Judgement about one thing, but the same Judgement was not given about any other thing. Then the thing which has Allah's Judgement in its favour is authorized, else are unauthorized. For Example
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"And what We have revealed to you (O Muhammad) of the Book, it is The Truth." (Faatir-31) So, here in this verse Allah says that His revealed Book, The Quraan is The Truth. Allah certified only His revealed Quraan as The Truth. So, The Quraan is The Only Book of Truth. No other book (Imaam Bukhari, Imaam Muslim, etc) is the book of Truth, because they have no Divine Certificate from Allah as The Book of Truth.
Same way only Allah's Quraan is not a fabricated book, other than Al-Quraan, Imaam Bukhari, Imaam Muslim, Musnavi-e-Roomi, etc, are all, for sure, fabricated. It's a serious matter. It is a matter of Tauheed and shirk. It is a matter of Paradise or Hell. And because of the seriousness of this matter, Allah confirmed for His humble slaves that His Quraan is not a fabricated book, they must believe in It. Other than The Quraan, Allah didn't confirm any other book as "not fabricated." Then how can Allah's momin say that Sahih Al-Bukhari, Sahih Al-Muslim are not fabricated, because Allah didn't say this.
Couldn't the Messenger write his own explanations of Quran with his own hand?---Yes, he could.-------But the Messenger never wrote his own explanations of Al-Quran with his own hand, and even never ordered his righteous and rightly guided Sahaba to pen down his extra-Quranic sayings.
What is Sahih Al-Bukhari, Sahih Al-Muslim and Sihah Sitta?--The big-ones of the Ummah say these are the Hadith of the Messenger.---Don't they know that in The Sight of Allah these are not at all the Hadith of the Messenger?---If only the ummah had read Allah's Quran, they would have known that in The Sight of Allah, Al-Quran is the Hadith of the Messenger.
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"This (Quran) is the Hadith (Qol) of a Noble Messenger." (Al-Haqqaa-40)---
Allah has declared that The Hadith of His Exalted Messenger is Al-Quraan.--That's it.--Allah has put an end to all disputes with His Verse.---But still, if someone disputes and declares that Bukhari and Muslim are the hadith of the Messenger, because the "misled big-ones" of the ummah declare so, then he is disputing with Allah's Clear and Easy-to-understand Verse. He is an enemy of Allah and His Messenger.
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"This (Quran) is the Hadith (Qol) of a Noble Messenger." (Al-Haqqaa-40)---
Yes, only Al-Quran alone, and not at all Sahih Al-Bukhari and Sahih Al-Muslim.--So sad, the whole ummah is fighting against Allah and His Messenger, because they don't have Imaan in what Allah declares in His Quran---"This (Quran) is the Hadith (Qol) of a Noble Messenger." (Al-Haqqaa-40)---and the Messenger said in, what is his Hadith------"This (Quran) is the Hadith (Qol) of a Noble Messenger." (Al-Haqqaa-40)---
So, when Allah and His Exalted Messenger are declaring that Al-Quran is the Hadith of the Messenger, then why the "misled big-ones" of the ummah demand to accept Sahih Al-Bukhari and Sahih Al-Muslim as the hadith of the Messenger??? -----Do they want others to do open Kufr of Allah and His Messenger?-----Do the big-ones want others to stand against Allah and His Messenger? If they have taken their big-ones (Imam Bukhari, Imam Muslim) as their rubbs, why they invite others to commit the same Shirk?---Do they not fear Allah?--Oh, no!---Do they not use their intellect?--No, not at all!
Contemplate, when Allah has already declared that---"This (Quran) is the Hadith (Qol) of a Noble Messenger." (Al-Haqqaa-40)---then how can Allah's momin go against Allah's Clear Declaration by having Imaan that Bukhari and Muslim are the hadith of the Messenger? How can he become a Kafir of Allah, by accepting Sahih Al-Bukhari and Sahih Al-Muslim the hadith of the Messenger??? When Allah never mentioned the name of Sahih Al-Bukhari and Sahih Al-Muslim in His Safe, Holy and Supreme Quran, then how can a truthful slave of Allah, without any proof, accept them as anything of any importance?
Why do some people always call people to follow the Unauthorized books of ahadith?