Should I answer “Ask HN” questions using ChatGPT?

No, I made a thread about this when ChatGPT came out - https://news.ycombinator.com/item?id=33891538

The user didn’t go to ChatGPT.

They didn’t title it “Ask ChatGPT.”

That being the case, what would you hope to accomplish in doing so?

No, unless the question itself is AI-generated or specifically calls for AI response.