There's yet another aspect:
People (at least I do so) come here for help from real experts – if I wanted to get an answer from ChatGPT, Bard or whatever else AI engine I can go there and ask myself! So I join in the request to permanently ban any answer from any AI engine.
I'd even go a step further: People repeatedly answering with AI generated content should get reprimanded, and if repeatedly ignoring maybe temporarily get locked out from answering entirely.