I don’t think it’s what everybody wants, but a subset of people, just like people would even want a more plain text / Markdown look (like me) for the editor.
The same reasons that were brought up “against” a pure markdown view (which in my opinion could be just text with highlighted Markdown syntax, as I made my theme look like), are the same reasons “for” it — e.g. I would want to see the exact links all the time.
Arguing for this kind of work view in addition to the currently existing workflow is totally fine for me, but instead of would be something I disagree with.
On a personal side of needs, there’s about as much additional value in WYSIWYM as a Andy Matuschak view. It looks nice, it is great for consumption — which are two things that come for me after text work and production, and not instead, nor in front.