Some time ago, I met an HR person at my job. She wasn't actually part of the workplace HR team, rather, she was more like a classmate of mine, but she had worked as HR in the past and wanted to continue to do so in the future. She was kind and polite, so I never had any beef with her, but she consistently had the shittiest, most inhumane takes on how to manage and interact with people I had seen in a while lol.

Meeting her made me arrive at the conclusion that you just said. Empathetic people that get into HR with the idea of helping make the world a better place would eventually resign or, at least, be very ineffective as HR. The only people capable of staying in HR for a long time are sociopaths who don't mind lying and being obtuse in job offers, and ruining someone's life so their boss can squeeze a couple of extra cents. The profession itself only serves to make companies more ruthless and adds nothing of value to the world.

I've never met a HR person I liked. The best I could feel twords then was quiet toleration... Now Ops folks, those people busy their asses to keep the ship from sinking.

Police officers actually don't just attract bad people, they are specifically selected for it (in the US anyways, in other countries governments may actually care about that sort of thing though YMMV.

Same for human resources. I've known quite a few people working for HR and most are just people, lie you and me, doing a job they mostly like, but yeah, sometimes requires them to be in shitty situations that they didn't envision before.