Like I said, I can’t force you to see it. The fact that you think it would mean re-engineering the whole platform means you aren’t getting it. It’s almost literally the suggestion of least effort, it’s largely an organizational change that encourages instances not to cope with more responsibility than they can deal with by encouraging decoupling the current structure into two more specialized ones.
You make this about me, but nobody else sees it. As you said, content instance are possible today (admins just have to disable their registrations), but nobody does that.
Let’s just agree to disagree