I think you are quite close to answering it yourself. Like I said, I am not sure we all have a soul, some sure live their lives as if it was never completely outfitted.
And then perhaps the soul need nurturing to become complete, so that leaves room for incompleteness.
But it does seem there is a sense of being, that is beyond the body and biology. My being that I first remember as a toddler, is the same guy it was twenty years later, and then the same guy is still here today. He asks different question, he seeks different things, and yet he is the same. His body is sure as hell different, but he is not.
I am with you on God, while I am sure we were created by god, I have no sense that he interferes with us daily or actually at all. Probably does not need to since most of us have the soul created by god to guide the biological creature at the higher level, conscience, morality, spiritually.