>Rationally speaking, the only people who should prefer interviewing to other things are the people that benefit from hiring talented people, which primarily is equity holders of the company.

I've actually been burned by this one a couple of times. Some people on the interview team recommended against hiring me. That wasn't because they thought I was a bad programmer. Actually, they were concerned that I was too good of a programmer, and they didn't want the competition.

Feedback from hiring manager: "I thought you were great, but some people on my team had doubts. Therefore, no hire."

If the interviews are conducted one-on-one in private, nothing prevents the interviewer from falsely saying that you bombed the interview.

That's one reason "Only hire if everyone on the interview team says yes." is a bad idea. Some people will say no to good candidates, precisely because they don't want competition. Only someone with meaningful equity in the business wouldn't have that incentive.