The problem is that most of the people in my circle who are returning AI answers to emails and chat messages do not understand enough about the topic to know whether a question is interesting or not, which parts of the response are interesting, and which parts apply.

They seem to think they've more or less solved the problem by posting an LLM's response to the issue or concern I've raised.

I’m just wondering how those people don’t understand they are strongly signaling their job can be fully done by an LLM.

But why would ask these people about topics they don't understand? Or they sending you unsolicited responses?