This doesn’t make sense - cheating on what?
> Now with all those aptitude training [...] that require you to turn on your webcam
They are referring to an automated personality or skills test to screen candidates. The webcam is to make sure the applicant is the one actually doing the test. These things are dehumanizing and snake-oil but there’s’s no question that applicant misrepresentation happens, including situations where the person interviewing is a ringer being paid by an agency or the applicant.The problem here is that companies have now gone from identity verification to this 'aptitude test' ML bullshit that's just another cover for increasingly weird arbitrary discrimination against applicants.
It doesn't benefit genuine candidates to blatantly lie. They'll get caught later in the process. But you're assuming identity thieves are acting rationally or fear getting caught. They don't, and they're playing a numbers game. If you get past an interviewer and get fired after two weeks, your salary at a US tech company can be $5k, which is the average annual salary in many developing countries.