I'm a bit taken with the "bicameral mind" theory and how it might explain parts of this. The basic gist is that in pre-modern societies it was the norm to hear

I'm a bit taken with the "bicameral mind" theory and how it might explain parts of this. The basic gist is that in pre-modern societies it was the norm to hear voices or other sensory information and interpret it as the voice of gods or spirits. So religious information wasn't so much myth to them as it was a way of classifying the voices in their heads.