Have you ever had to restrain a person who might want to kill you? While wearing a firearm? I have done some grappling in MA myself, but I imagine the stakes are in another dimension on a real situation.
I'm not totally certain there are any people who can be "good" at it in the sense that they'll never make mistakes or lose their cool. Then consider that there are over 10 million situations every year where something may go wrong. How could you make it never go wrong?
You are probably also taking it out of context. You have no idea what has happened in that neighborhood in the last year or decade. You have no idea what those perps and officers have experienced. Right?
Yeah, you’re right. I was exaggerating for some reason I don’t recall anymore, a bad day perhaps, too much or too little coffee or something. Who knows.
Of course I don’t discriminate at hiring time against people who disagree with me on such a trivial technical detail. Or hunt for them so I can maintain secret lists of undesirables. That would be unethical, probably illegal, and definitely stupid.