Something that strikes me in reading articles like this, is the distopian part often seems to be thinking about this:

    p(job_capable | not_interview_capable)

That is, it's crazy that an interview could miss so many people qualified for the job.

However, I wonder if oftentimes companies are aiming for..

    p(job_capable | interview_capable)

If p(job_capable | interview_capable) is high, and p(interview_capable) is pretty good also, then the company will probably get what it's looking for.

This means that the author is right to recognize the test is doing a bad job of measuring their job readiness. A reasonable instrument in this case doesn't have to measure everyone's job fitness (whether there are nasty side effects is another big issue).