What is important is what we mean when we utter what we utter. The intention is the important thing.... not the etymology of the uttered word/expression. Then of course, there are expression, although innocently uttered, that we perhaps better refrain from using... like "bloody hell"... or worse...
Uttering 'jeez' doesn't mean we call on Jesus... and just because we celebrate Christmas it doesn't mean we believe Jesus was more than a human man, and it doesn't even mean we commemorate Jesus birth at all, whether as God incarnate or as just a human messenger.
Peace