Because religion is laughable

Funny Religious Logic

Funny Religious Logic Joke Picture - If P is false, I will be sad.  I do not wish to be sad.
Funny Religious Logic Joke Picture - If P is false, I will be sad.  I do not wish to be sad.
It's a funny, clever,  but sad cartoon, and is the nub of the issue of religion: religion determines reality based on wishes, not facts.  "Faith is believing what you know ain't so." (Mark Twain)

I tried for years as a seeker to bolster my fragile faith with books on Christian Apologetics such as Josh McDowell's "Evidence That Demands A Verdict", and I would suggest that a fairly decent case could be made for all of it, except for one thing:

It wouldn't need enough.

"Extraordinary claims require extraordinary evidence." (Carl Sagan)

And the claims are fabulous indeed.

Too fabulous to be credible by any sensible person who is honest enough to put aside hopes of an afterlife.