What is incredible is how one person not good at a job can ruin a medical practice. The doctors can be outstanding, but a bad nurse for one of them can drive away patients. Someone who handles billing medical insurance companies that isn't good at doing just that can interrupt the office's revenue stream. And unpleasant people who greet patients can also throw a monkey wrench in the business.
There are a lot of "moving parts" in a medical practice and a defective one can wreck the whole thing. We've come a long way since the old days of the knowledgeable medical doctor who made house calls, haven't we?