It seems the job selects for those types. I suppose people interested in law enforcement / justice that aren't that way either end up as lawyers or working for the FBI or something.

If you don't have any kind of marketable skills yet want to make a decent living with plenty of benefits, becoming a LEO is the easiest choice for most people.

Or if you don't have any marketable skills yet have a spouse that has a job with health benefits, you can become a real estate agent.

Those two career paths seem to be the most chosen for almost all of the 'not so bright' folks I grew up with.

Other way around, right? Those types select that job. You're weak but you want to appear powerful, so...

It's a use it or lose it skill. When you carry a badge and gun around and can bark orders at people all day and they have to comply or face the infinite violence you can summon with your radio your skin will grow thin over time.

Power corrupts, or some half baked version of that.