I guess loaded derogatory terms are somehow worse than otherwise worse-sounding terms. Think about it in the context of e.g. the n-word. “A piece of shit”, while sounding very bad: 1. is generic, can be applied to anything thus has no discrimination component, and 2. ends there. It has no history, no reference to previous usage, etc.

It doesn't really have anything to do with LLMs. There's no reason to anthropomorphize the software.

Edit: feels a bit like inventing an insult for your pet rock. If I met someone who acted superior toward an inanimate rock and used invented slang to insult it that sounded like a slur, that would feel bad to me too. What's the point except to role play a fantasy of some kind?

Use slurs when you're trying to offend, not in general use.

Trying to offend all the time is childish.