This has got to be one of the most simpleton explanation of religion I've ever heard. Santa Clause isn't believable as you get older because he's not real. There is no big guy sneaking down a chimney placing gifts under a tree. Umm.....duh. Jesus Christ and christianity is a whole other topic, and MILLIONS of people aren't raised in church, do not have religious parents, and find him once they're gray and old; when they have a "fully developed brain".
It's called searching for truth and finding it. If you don't care to know him, or seek him, you'll never see it, and he'll never know you.
Keep putting your faith in a ridiculous notion that all was created from nada, it's much more "critical" in thought, right?
0 = everything? Is that settled science? Didn't you learn last year in 4th grade math that 0 = 0, not 0 = 1,000,000,000,000?
You might want to leave the door open so there's a way in, and maybe you'd come around eventually. Most of this "no God" nonsense is just children angry at daddy syndrome. Why is there suffering? Why did grandma die? Where does evil come from?
Only a human would believe they are supposed to have every answer they desire.