Because it’s ingrained in the pop culture to say them as meaningless expletives at times.
For example if I were an SJW soy boy and you said the dredded word “nigger” to me or around me I’d probably react as all SJW’s and related leftard white nigger lovers do by first effeminately rolling my eyes at you right before screaming “Jesus Christ!” in prissy hysterical female fashion and then stomping off in an angry huff.
Another example is say I’m beating off to some hot Sandra Romain prison themed porn and I end up snarling “Oh fuck!” followed by “God damn!!” at the moment of climax.
That doesn’t mean I suddenly believe in bronze age fairytale characters dreamed up by some depraved rabbi in the desert. All it means once again is I used modern pop culture parlance to serve as a needed verbal exclamation point at a critical time during a self pleasure session.