Yet, we probably aren't doing these things daily, so what makes us think that given "perfect information" our nature would change?
Absolutely! We will always doubt and distrust even our own thoughts. Even outward confidence is sometimes replaced by complete uncertainty about the future. And you are right, we can always invent new gods or new fears.
Even now, before this paragraph of yours, I was thinking very differently...)
RE: Failing Foreseeables