That’s a very different kind of cheating though. The kind of cheating this effectively makes impossible is cheating where a player has more information than they’re intended to have.

If someone makes an AI that plays the game as a good player, then it’s effectively indistinguishable from a real player who is good. If they make it super-humanly good, then it would probably be detectable anyway.

It’s still fair in the sense that all players have the same (intended) information per the game rules.