That's a double edged sword though. Humans being bad at telling the difference between cheating and skill is not good for training your AI to spot cheaters but

That's a double edged sword though. Humans being bad at telling the difference between cheating and skill is not good for training your AI to spot cheaters but at the same time it lowers the bar for how good your AI needs to be. The metric for whether or not your anti-cheat works is "whether or not humans can tell others are cheating". It doesn't matter so much if it can't identify the subtler ones if the players can't either.