Taking the Holy Bible as an example of divine truth we quickly finds that almost no verse in it holds any water - everything is wrong. Creation of Earth and of the rest of universe 6000 years ago? (And in 6 days?) Nothing can be futher from TRUTH. Eve made from Adam's rib? Man being made by god's image/anatomy? (Then god is just another mortal body - bunch of chemical reactions, right? So, what is all this buzz about its unexisting "divine powers" then? A bunch of chemreactions having enormous "powers"? Nothing can be futher from truth.) Resurrection? Miracles? Walking on waters?
Duh, indeed, the truth that the Holy Bible in its best holyness is just a bunch of anecdotes primitive people once believed in - indeed hurts.
And if you once claimed to be a believer, then it is politically incorrect to back off and say: indeed, it is NOT a divine book and there are no Santa Clauses (gods) around.
It is more correct to say that Bible should NOT be considered as TRUTH, but should instead be "REINTERPRETED" by about 179.9 degrees to make it remotely comply with facts about Earth origin, about no resurrection, no creation of Adam or Eve, no water walking, no total diluge, etc.)
Also, it is more politically correct to deny textbooks ("Don't eat from the tree of knowledge, kids. It is BAD tree. Listen for the fairy tale instead. Once upon a time there was Creator. By definition He was not created by his father or mother. He simply was there ever and forever. Sorry, no questions allowed..."). And it is politically correct to point on someone well known (say, prez Bush, or Einstein, etc.) and say - look, he is ALSO a believer (and not specify details). See, how popular he is - he can not be wrong! He is so smart. So we, having much less intellectual powers, should of course be a belivers too - and much more humble belivers.
So, indeed, truth hurts - so many ignorant people still follow ancient superstitions.
I think, it is due to poor education system (if to speak about USA, for example, as most chatters around are from USA), or limited access to quality information.
Also, another driving force for religion is money. After all, it is multibillion dollar industry, and it is interested to "keep the ball rolling" (=money coming in) by issuing various books, brochures, videos, audios, theories, interpretations, explanations, by appealing to emotion and senses, by active recruiting new customers, etc.
Well, if the truth hurts, then the only choice you have is to REJECT the truth (facts) and turn to religion myths. Buy a $9.99 Santa Clause (or Budda) statue, lit a $0.99 candela in front of it and consider yourself completely "set".