Halcon: Suddenly these primitive people, supposedly more evolved til then to primarily just survive, don't sound so primitive after all.
I'm not sure I understand how my statement led you to this conclusion.
Halcon: But again, why would they go through all this to begin with?
I don't know. Curiosity? A desire for some degree of certainty? These are traits we still carry with us today, and they likely would have been much more useful in our distant past. Our complex social structures and behaviors would have existed back then, and also been more useful to develop in that environment. I think it is inevitable that human communities would go through this, over and over. It's how our brains work.
Halcon: The appearance of God and gods in ancient writings everywhere simply affirms how either the concept of God was instinctive in man
I think that religion is a form of tribalism, a way to tighten the bonds in a social group by defining us/them boundaries. We see this in many mammal species, and especially in many primate species. We also see this in how humans behave today in many other areas of our lives. Is it reasonable to invest as much of ourselves into sports teams as some people do? Or actors? Or made up story worlds? Of course not. Yet, we do.
Religion is the ultimate expression of this behavior. That primitive groups with a sharp focus on survival would develop it as they did, with gods and rituals and rules and ceremonies and deep emotional commitments, does not seem far-fetched.