I don't think there is dichotomy between ability and cheating. The dichotomy is just too make us feel better if we lose against cheater.

Highly skilled people cheat to get little bit more advantage against other highly skilled people. And it is harder to catch them, because the ability demonstrated in some situations means everyone will go out of way to excuse them.

Highly skilled people cheating also means that only cheaters can rise to the top of competition.