You can disagree with someone's view, but editing their words with AI doesn't make them wrong or disingenuous any more than asking another human to critique your post would be. And to imply otherwise is, itself, disingenuous and disruptive.
The exception would be if you thought there was no human involvement in the account at all, in which case, as another commenter noted, the appropriate thing would be to email the mods.
b.) Another way to look at it is, "do you think it would be the top comment if the author didn't solicit feedback and thoughtfully edit their comment?" To which I would say, "who cares? Editing is fair play. Let's talk about our actual points of disagreement."
c.) To be frank I think this response from you is very telling. I haven't seen you engage at all with the substance of the comment. But you press very hard on this "AI" angle. The commenter has now shown us their pre-AI draft, and it's much the same - I think if you had a good-faith concern that it was "manipulated," that would satisfy you. Since it hasn't, I infer that your concern is either puritanical ("no AI must ever be used in any way") or that you are attacking the style of the comment when your real issue is it's substance.