You've answered yourself if fourth paragraph. For me (and guessing for many other engineers) usability is more important than crisp visuals..

I personally prefer same font (one I choose) everywhere opposed to "whichever font developer likes for his app).

TUI apps are quick, efficient, portable and usable through ssh. If crisp graphics is the only downside I really don't mind.

Yeah, but as far as I'm aware you get to pick one font and one size as long as the UI is laid out with literal ASCII spaces and newlines. You can't have tooltips with a smaller font, or code and prose together with monospaced/serif fonts accordingly.