A key difference with the punt guns, is that they were used for commercial hunting, and the mass killing that market forces rewarded. Banning modern guns and features used for single-animal tags just isn't the same thing. Add in that someone might get that tag only once every 5 years here in Nevada, people have a number of reasons to want to make the best of their rare hunts, and ensuring they have the most accurate rifle they can afford is one part of that.
But here's the crux of the discussion: shooter capabilities are far less than the capabilities of the equipment they're carrying. Most hunters are probably 3-5 MOA shooters in field realities, while a $500 Ruger American is a 1MOA gun.
The problem isn't the guns - it's the shooters making unethical shot decisions.
More often than not, those guys don't want to make unethical shot decisions - their shot decisions are just so poorly informed that they're unintentionally unethical.
The solution is awareness.