ChatGPT is a free tool (even GPT-4 is free via Bing Chat) – if people want to get answers from ChatGPT then they can use it themselves. This site being a "ChatGPT with extra steps" doesn't really benefit anyone, just as this site merely being a "copy/paste of the Vim documentation" isn't very helpful.
A good edited ChatGPT answer is indistinguishable from a good human answer. I don't think anyone minds if someone 1) asks ChatGPT, 2) verifies the information is correct, complete, and appropriate for the question at hand, and 3) rewrites the answer ChatGPT gave them. That's no different than looking stuff up in the documentation and rewriting it: it's just one of many possible sources of information you can use.
The problem is when people don't:
- have enough knowledge to do step 2 well ("verify the information is correct, complete, and appropriate for the question");
- skip step 3 and just copy/paste the ChatGPT answer – or significant parts of it – without any editing, which is almost always badly written text.
If you find yourself asking ChatGPT and pressing Control+C on entire paragraphs then you're doing it wrong.
To give an impression of how well ChatGPT does:
Humans are wrong all the time as well – I've certainly posted my share of wrong or incomplete answers and I've downvoted plenty of them over the years – but I've rarely been as "confidently incorrect" as ChatGPT. Words like "maybe" or "perhaps" are not in its vocabulary, never mind things like "I need more information to answer your question", "what you're asking for is daft", or "this sounds like an XY problem".
In short: ChatGPT just gives bad answers, even when it's correct. Combine this with the fact that it takes almost zero effort to actually post such an answer it's best to just say "ChatGPT is banned" as that's a simple and clear policy, whereas "ChatGPT can be used as an information source if you verify it for correctness and completeness, and rewrite the answers" is vague and unclear.
In the future all of this may significantly change. I don't think it will, but it might. Whatever the case: today is not the future.
P.S. another example: ChatGPT confidently asserts that I contributed to cwm. This is complete nonsense, I never contributed a line of code. I also never worked on NeoVim beyond posting 3 or 4 messages on their issue tracker; some of my patches to Vim did end up in NeoVim. When I asked it last month it confidently told me I was an OpenBSD developer – also complete nonsense. Also note it claimed to not know who "Martin Tournoij" is, but then stated that "arp242 is Martin Tournoij" – this is a pretty good example of how ChatGPT doesn't really "know" anything. It also asserts that GoatCounter was created by "Jan-Lukas Else"; I have no idea who that is, and he never contributed any patches. If I ask it directly it does answer correctly.
This site was launched on September 11, 2011. Oh no, February 19 2013. Or February 18 2013? We're still in private beta. No, we did leave private beta. Ask ChatGPT the same question a few times and you'll get directly opposing answers.