I'm thinking the poster could easily use chatGPT the same way as his opponent, there is no advantage to one side or the other here.

The main value in introducing a third party (which in this case is software) is to take ego out of an argument and start arguing against a problem rather than a person. This is why I referred to it as therapy. chatGPT is an echo chamber of human writing with a few guardrails, much like speaking with an impartial therapist.