This is one of the reasons I left Medicine for computing... He is not right that doctors are oblivious to these mechanisms. Most of the things he is talking about are very well known to the doctors, but most of them become obvious only when you start practicing, and (for most) there is no turning back. Most people (unlike me) don't feel very comfortable abandoning 6-10 years of time money and effort investments and switching jobs, and they choose to play the game...