it avoids stupid situations, even in the world of smaller aircraft. I can't spam Detroit-Los Angeles with CRJs either, and that's a good thing. I already have a 1200NM margin of manoeuver with them for USA domestic flights, and it's already really powerful.
So it's far from perfect, and I remember my 737 transatlantic flights(especially from Nantes and Cardiff), once juicy, suddenly getting outdated because of demand increase. Counterintuitive, but makes sense, at the end. The game is better with the limit than without - even ir more readability would be welcome.