If you’re actually intended to Paint in MS Paint, as in create things from scratch, you need to limit the upper end of quality for it to be usable.

Otherwise you might as well use photoshop.

(But no I’m not kidding myself, I realize the days of using Paint to actually Paint are over)

There's a bunch of smaller editors that don't have such problems, like paint.net for example. It's an arbitrary "limit" (accidental even) stemming purely from bad quality implementation of basic features, not from how basic that feature set is.