I think you don't fully grasp the role and importance of self-publishing. Their main goal is not maximizing how much profit you extract from a book, but persist

I think you don't fully grasp the role and importance of self-publishing. Their main goal is not maximizing how much profit you extract from a book, but persist content in a format that is both easy to distribute and to store perpetually. It's about cultural contributions and not the next best seller. There's a reason why some universities run their own publisher.