We can only speculate on evidence we have. The prehistoric chubby dolls (Venus figurines) from archaeological digs that many hypothesized to be fertility totems can be hypothesized to be just idealized symbols of female form as the shape changed depending upon the average temperature - ice age meant fatter dolls, temperate times meant thinner dolls. https://www.sciencealert.com/the-mystery-of-the-enigmatic-ve...

We always want to pretend that we're better and more evolved than those knuckle draggers of ages past -- simply because someone else made a computer for us to use.

> Religion always seems like the default explanation for anything without an obvious use and it seems lazy.

This is one of the bits I remember from reading A Canticle for Leibowitz as a kid. It's about monks in a post nuclear armageddon world. At one point they find an ancient fallout shelter with a bathroom, and they interpret it as a spiritual space where a priest would sit on the "throne" and read "holy scrolls" held by the metal bar next to the throne...

I think we make that kind of mistake when doing armchair archeology or anthropology a lot.