But actually learning from those docs is amazingly hard. It's like "documentation theater". If you start as a naive user coming in, it keeps teasing you that its going to teach you something but you just get abstract concept after abstract concept and you STILL don't know the mechanics of how a build works. You have to kind of reverse engineer the info that Bruce describes out of the documentation. Even when you manage to hit actual code examples with detailed explanations - they are described in a way that fails to give you the generalisable understanding of the internals that you need to actually create new things that you haven't seen before.
As a developer it generates a distinctly hostile feeling of helplessness and powerlessness.