This doesn't explain why doctors are selling though. Why aren't doctors just not selling their practices and taking a more relaxing job running things themselves? Why are they choosing the option that requires them to "rush through the cases, and [keep] busy seeing patients every working minute"? Surely if that was something they enjoyed doing, they could do that and capture all the "slack" for themselves? So why sell your office to someone else to capture all that slack while your own work load increases?