While theoretically it's true, it's not true in practice. I worked in two big tech corporations and in both all interviewers who did more than 15-20 interviews

While theoretically it's true, it's not true in practice. I worked in two big tech corporations and in both all interviewers who did more than 15-20 interviews converged to 50%/50% hire/reject ratio. Candidates are not compared directly to each other, their performance at interview is still compared to average performance.