You're right, denial doesn't change reality. No matter how much you deny the fact your god doesn't exist, the reality that he is a mythological deity thought up ancient people that thought the world was flat will never change. I guess I'd rather live in what you call 'sin' than utter stupidity.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell