It seems like he is talking about influencers, where there is a relationship that is based on abstract metrics like number of followers and unclear success. Here I use abstract and metrics together to convey the idea that the metrics does not give a real meaning. Obviously there are many people who perfectly deserves their "followers" but it is gamed by other people removing real meaning.
I thought of it more like if you went to go hire a doctor, then the best people to review that doctor would not be the university that gave the doctor their credential, or even the doctor’s patients; it would be the doctor’s colleagues who understand the doctor’s strengths and weaknesses best because they are the only ones who have the direct relationship as well as technical skills to compare against.
I think that's incorrect. He wants clients to consult other clients, not professional colleagues.
I like it in principle, but in practice it's too amenable to gaming (witness every review section and spam-fed product listing in my search results) to actually work at scale.
