Hi Jack.
You are touching upon very profound questions. Rather than go into a detailed elaboration of my thinking, let me just say that your theory here would be a psychological interpretation of the Garden of Eden story. It is also possible to interpret it from a spiritual perspective. You have already read and clapped this article of mine, but you might consider rereading it, to see what I think the deeper, more esoteric understanding of this myth is:
https://medium.com/@graham-pemberton/the-garden-of-eden-revisited-293c59b35be8
I think that if we combine the two versions, we might be somewhere close to the truth.