I don't have an issue quoting LLMs in and of itself, but the context and how you present it both matter.

"ChatGPT says X" seems roughly equivalent to "some random blog I found claims X". There's a difference between sharing something as a starting point for investigation and passing off unverified information (from any source) as your own well researched/substantiated work which you're willing to stake your professional reputation on standing by.

Of course, quoting an LLM is also pretty different from merely collaborating with an LLM on writing content that's substantially your own words or ideas, which no one should care about one way or another, at least in most contexts.