I’ve considered whether the human concept of religion is possibly rooted in debates as to whether other things are out there. Because once you’ve had that conscious thought I think it’s a short hop to making up stories about who/what it is that could be living out there. Time passes and it becomes indoctrination for many, and on the mind for most at times of their life even if just out of curiosity.
Definitely not on a hill over this but it’s just been a thought I’ve wrestled with at some point. I’m sure it’s not even original at all.