Measured effective outcomes of treatment.

The surgeon example was on testicular cancer if I recall and there was a variance of 7-8% in more senior surgeons over junior from recurrence of cancer at a 1 year interval.

You can argue about specific treatments or how outcomes are measured, but some modern medical treatments truly are good and the old guard aren’t keeping up with newer knowledge as readily as the younger Gen who are exposed to more of it through their education and ongoing self-learning whereas the practical interventions of surgery require more attempts to hone the skills although the exact nature of why the outcomes are measurably different aren’t understood.