ALL religion is "man made" and cannot be proven otherwise. It is spoken by men, explained by men, determined by men, told to men.
Sure, you can claim it comes from some non-human source - anyone can say anything, believe anything, assert anything - but there is no evidence. At all. Just belief in your interpretation of what someone else said that someone else wrote down.
I may never know all the mind bending questions, but who cares. Why bother.
Even with religion, all you have is BELIEF. If that's what works for you, great! But let's not pretend that it's objective proof - it's assurance of things not in evidence. It's a CHOICE to believe in it.
Why do people waste their time, lives, and who knows what else, mentally masterbating over some book written during the stone age?
Because the SENSATION, the BELIEF of having answers and knowing the future gives a sense of safety and comfort - people will go to GREAT LENGTHS to maintain that sense of safety, of comfort, of BELIEF.
The alternative is just too frightening to accept.