I agree but I companies like Meta/Apple/Amazon hire so much that they probably have full time statisticians just to analyze interview process and map that back to performance. So you have to assume this maps to real world success. Even if you are just testing an employee's preparation, maybe that means something.
The "Big corporation analyzes everything thoroughly and arrives at the most optimal solution" is a ridiculous myth, and I don't think I even need to give examples. Maybe not Apple, but Amazon surely has a lot of embarrassing failures.
When I was an engineer at Amazon, we all just made up our own questions, or passed fun ones around the office. I assume the Bar Raisers probably had an actual rubric, but the rest of us didn't (and we all had interviewing quotas to meet)
I left a while back, but folks still there tell me not much has changed (except they do a lot less hiring these days, so quotas aren't as big a part of the promo package)
