What makes you say it's completely detached from what it takes to do the job? The only evidence that I see cited often is some study by Google that says success

What makes you say it's completely detached from what it takes to do the job? The only evidence that I see cited often is some study by Google that says success in the interviews didn't predict performance, but Google continues to use the same model for interviewing. I would think an organization that big would have people devoted to improving their interviews and would change it if they thought it had bad outcomes.