I think I understand why WP is so popular; it optimises for the editing experience and for the vast majority of situations this is fine; building the website is cheaper and quicker, and the audience doesn't really care about a 200ms lag on rendering.

My confusion (and I never described this as anything but confusion, so I don't understand your reference to me hating users) is that in a process where we can do better, and use tech that is more appropriate, faster, etc, there is still a preference for WP. Even when the people involved don't have to deal with it. Is it just familiarity, or control, or what? If we have the chance of optimising for the reader's experience, I would think that that would be a huge plus, but apparently not. This is confusing, and a little annoying.