Other people.

Terrorists and school shooters. Frankly, if cops were as gun happy towards Nazis as they are everyone else, we wouldn’t have quite the fascist problem.

Now, I’m not saying an idiot with a gun is the best solution to those issues, but it would be a solution.

Its a system that does some things really well and some things very poorly, like every other TTRPG. Thus trying to force 5e to do things it was never meant to often either results in a bad experience overall, or basically not using the 5e rules at all.