why did Ra build the pyramids to align with the Orion Star Belt?

[ada]

That's the beauty of free will.    
But such thoughts, imo, aren't healthy for the mind.

I'm interested to know what's unhealthy about putting ideas out there and searching for clarity?

Well, that depends on the person I'd guess. Just in general, the specificity isn't of great importance. One can indulge and worry and find exactly what worries them to no end. There's just no pinpoint understanding to be found.
In the unveiled metaphysical realm, if all can be seen as one, then anyone can be seen as anything. Just as the occurence where those of Yahweh we're replaced by other beings whom called themselves the same but had different workings. It's just my opinion of course, I don't know better than anyone. But I've seen what this does to people, myself included. And some weaker minds can lose trust in the world around them quite easily so, that is why I suggested it's unhealthy. We are free to explore whatever our will, but we have to be aware of how it affects others too.