However this kind of stuff is very popular among that crowd, the TPOT subculture there, and the rationalist adjacent group.
But it's also got the structure of marketing. Or a pitch for a cult. Or both.
It is literally book-ended - they mention the new book in the first and last paragraphs.
As far as I can tell it's no different from a pitch for other popular spirituality books. A tease that there is an answer, the author discovered it, but now is not the time for that revelation. Boring.
It's just targeted towards an audience that has different filters, and different expectations for what enlightenment might look like. Apparently for some it involves PKD-like psychonauttery, name-checking Bay Area grifters of past and present, post-rationalism, etc.