Yeah I rolled my eyes at that, but publishers basically require the front 10% of non-fiction be like that. It's for the people walking through book stores and picking up books to browse.

Thats why we need disruption in the books publishing industry

You have it. You can self-publish.

Publishers are not actually idiots. By and large, they know what sells.

Self publishing doesn't work because there is no filter for quality or editing.

I guess I'm not sure what you mean by "doesn't work." I've gone through publishers and self-published. They come with different tradeoffs including the complaints about how publishers want a book to flow as described upthread.

Reviews are at least something of a filter.