The only two physical requirements for a surgeon is "two limbs with hands attached and two eye balls that can give you a perception of depth". Normal dexterity is a plus, I have scrubed with a heart surgeon whos hand shakes like he has parkinson's disease, yet he is able to get the needle and knife to the right place each time. Doing surgical operations is a technical skill that can be learned by just about anyone in good time. The "art" of surgery, which gets more complicated is learning the indications of when to operate and when not to operate. Also learning how to deal with intra-operative and post-operative complications takes time and years of experience = wisdom. Those are the hard things to learn about surgery, not the actual technical skill. I think the steepest learning curve happens when a surgical resident finishes residency and just starting to take on the "full" responisbilities of their patients, both in the OR and clinic. Just my opinon.