The point they are making is that if you’re hiring a fake person for a job who can’t do the job, some of the screening questions should’ve let you pick up on that. And if you don’t you’re at best a bad interviewer.
You dismiss people who fall for this as bad interviewers but I don't think you appreciate how sophisticated fraud has become-- with teleconferencing (anything internet-based, really), you never truly know you're interacting with who you think you are. You may not find out until they've collected a few paychecks, made copies of all your IP and disappeared into the night.
Any company who is hiring off the internet, internationally, on the basis of a deepfake and a resume and is granting them elevated access to client PII on day one deserves to be exploited and deserves to be sued by their clients.