https://en.wikipedia.org/wiki/Marsh_Chapel_Experiment
I don't remember the experiment, I think it was on Radiolab, where something like 10 non religious people took LSD and 9 ended up becoming priests from the influence of their experience.
The idea of "God" and religion seem to arise more readily from experiences at the extremes of human consciousness. Whether it be trying to make sense of the chaos and death on one end or the unimaginable beauty and interconnectedness on the other.
Rigorous religious rituals and benevolent paternal overwatch can help bring comforting structure and an answer to "why?" to those living through hardship just as the idea of an omniscient watchmaker can help make sense of overwhelming, awe-inspiring realizations about the complexities of reality from a peak psychedelic experience.