The part where you don't talk to anyone else, just a robot intermediary which is simulating the way humans talk, is part of UX. Sounds like pretty horrifying UX.

Where in the process of "ask question" -> "closed as duplicate" are you interacting with another human?

Most of SO didn't seem to consist of people talking to each other so much as talking past each other.

One UX experience that was clearly replaced by other services and spaces before the widespread use of AI doesn’t sound very compelling to me.

Be more creative than AI.