The analysis claims to have covered the skills of 150 million workers in 1,000 jobs. I'd be willing to bet that the analysis didn't cover *every* skill required for even *one* of the jobs.
For example, take the job "receptionist." That's typically an entry-level job that requires skills like answering the phone, taking messages, greeting visitors, and so on. But did the analysis also cover the need for a receptionist to sometimes prevent a visitor from just walking into the offices without knowing their purpose? Or the need to know who to call when somebody shoves their way inside anyway? These are things a normal, uneducated human wouldn't have be trained to do, but AI would need to be told explicitly.
The point is, even the simplest, most entry level jobs include all kinds of *implied* skills that the researchers almost certainly did not include in their analysis. AI can do a *part* of many jobs, but that's not the same as saying that it dan *do* the job.