I've watched professional games in SC, CS and DOTA for decades and I definitely agree that pros are indistinguishable from a good cheater (not a rage hacker).

One of the issues around this is cheating within pros too. People that are actually good at the game, but use cheats to get even further ahead. These players are already statistical anomalies and even from an experienced player's perspective, you can't tell if they have an amazing game sense (many really do) or he's wall hacking, as an example.

I have never seen cheaters being an issue (even the few times people set up tournaments with prizes), which makes me think that this might be limited to very few games (in very specific genres) ?