I'll try to phrase it so that even someone who is not a research scientist (?) can understand. I'm not one, whatever that means.
Let's define the interview as useful if the passing candidate can do the job.
Sounds reasonable.
ChatGPT can pass the interview and can't do the job.
The interview is not able to predict the poor working performance of ChatGPT and it's therefore useless.
Some of the companies I worked for hired ex fang people as if it was a mark of quality, but that hasn't always worked out well. There is plenty of people getting out of fangs having just done mediocre work for a big paycheck.