After 10 years, most surgeons (and other highly trained professionals) are just hitting their stride - enough experience to be really proficient and know one's limitations, but not so old as to be set in only one way of doing things. Some would even say 10 years is too inexperienced, and many doctrs are still paying off their student loans at 10 years out, not financially ready to retire.

Besides, after having invested 20 years into professional training and becoming a surgeon or other kind of doctor, most are having too much fun to retire - retirement would be a letdown for the next 40 years.