While I would like to agree, the interview is but a portion of the larger picture. You could argue almost every stage of the medical school process has bias.. literally from the beginning. A few people had to see you on paper and like you for some reason! At the end of the day, an entire committee of ADCOMs vote on you. An average interview without red flags would not be the reason you wouldn't get admitted whether it was an MMI or not. It's the collective of information and how you presented yourself in your entire app. Do you fit the mission of the school? Have the stats? Carried yourself well on interview day? EDIT: I don't mean "you" singling you out, but generally.
FYI, I asked for interview feedback from a school that I was waitlisted at to see if I needed to work on it. I actually was told my interview was above average, yet I was still put on the WL for months [ultimately accepted though].
While I agree that interviews with 1-2 people are filled with bias, that's the way of the world. Most jobs have a single, make or break, interview! I'd much rather have 2 30 minute interviews with faculty where I can connect with them than short convoluted stations in MMI [personal opinion].