I thinks it's a matter of heavy investment and time running out. In the end, the only truth is what science proves, but one does not have to turn into an animal or become evil, because of this fact.
You are only here for a short time. If you can see the damage of this investment and the toll it takes on families and opportunities in life, it doesn't take science to figure out, that it is not worth accepting someone elses truth, in obedience, with no payoffs.
Once you've been shunned and cut off, in my experience, your life is pretty much over anyways. Can things get any worse? Yes, life itself can be like that, if you don't do anything to better yourself. What have you got to lose? Why can't people just admit that we don't know the answers to certain questions yet? There is simply to much potential for lies and abuse of power when you start following someone elses idea of what truth is. I have spent enough of my life being maipulated. That's one truth that comes from my heart.
Perhaps if folks listened more closey to their inner pilot to find out whats wrong, instead of seeking absolutes from the outside world they would find much greater inner fulfillment. Most lack the courage and take the easy route. My two cents anyways.