That's a very technologist know it all answer.

As if we fully understand, brain, conciousness, biology, body & spiritual experiences fully. There is so much to learn.

The questions for instance arises how does this connect to emotional & spiritual experiences that derive from those practices.

It's the same with psychedelics, they are chemically induced but often lead to meaningful experiences due a shift in the way we experience reality & conciousness.

Is it a peak into a wider experience of the world that makes us realize the world as we experience it, might not be as real as we think it is? Who knows, so many interesting questions & options.