Well - part of the problem with the use of these tools is well - while they are correct linguistically, they are often factually wrong. Part of the problem here is people literally ask ChatGPT the answer, post it exactly as it is, and figure they can get away with it.
People put too much faith in ChatGPT. It doesn't reason, and it doesn't think. It’s literally a very clever language model that's somewhat better than infinite monkeys.
I'd say if someone figured out a large language model that worked perfectly for what SE does, the sharing and synthesis of knowledge, we might become obsolete.
I'd note that it's not the 'sites' that have told moderators to ban ChatGPT. Moderators banned ChatGPT because people keep posting obvious garbage on our sites, and it's a lot of unnecessary work for no benefit to anyone.
If you're not willing to specify out and ask your own questions, or are unable to answer them, Q&A isn't really for you. If you trust ChatGPT to answer your questions accurately and for certain values of truthfully, you don't need the network. If it is not even smart enough to detect its own writing, how do you expect to actually generate something sensible?
Literally most of the folks who are posting things off ChatGPT are 1) trying their luck 2) cynically hoping people won't notice the answers are a little off 3) don't realise ChatGPT writes a certain way or some combination of the above.
I don't even use a ChatGPT tool except to confirm, and often I know just from how it's written. Quite often where I'm an SME, it makes no sense.
And if you're going to fix up the output, and prompt an engineer, and independently check the answers it gives, you might as well write an answer.
All in all, there's no real place for AI generated answers here - either because they suck, or if AI worked well enough, we'd be obsolete.