I don't think people cheat to learn skills. They cheat to get a credential that can be used to get them into a job. The credential differentiates them from the non-cheating or non-intelligent population. With it they can manipulate others into thinking they are worth more than they are.

Of course, at that point you might think they'd be out of their league but in many cases this won't be the case. There are a lot of jobs which require great degrees but only to get in...