To some extent, I agree with the above. Despite being a surgery resident and aspiring surgeon, I do have outside interests and a life I want to live and the remuneration angle is important. It is important to know when to let someone else take care of the next patient coming in, though as I progress through my residency I am forever chased by the idea that I have a lot left to learn and a dwindling amount of time to learn it and sometimes that can make it difficult to let go. I am less interested in "balance" during my training than I will be in the future because my perspective is that NOW is the time I have to learn the intricacies of surgery so that I will be a surgeon my patients can trust later on. In surgery, sometimes that means staying late because we can't really plan for when the perforated colon or ulcer, AAA, or GSW comes in. You have to just BE there when the opportunity to learn arises, you can't plan it, so sometimes that leads us to staying later than our prescribed hours.
For me, the difference between being a surgeon (of any ilk) and another specialty is that what we do is typically much more invasive. To be entrusted with cutting into someone's flesh and removing/rearranging their internal organs is, to us, different than the medical management of DKA, a stroke, an MI, etc. It is NOT that what we do is any more important than an internist, an EM physician, pediatrician, etc. It is just different sometimes. If something goes wrong, whether it is technical error or not, I feel responsible and I consider it my responsibility to be there to correct whatever went wrong if at all possible. Yes sometimes that means that one of your coworkers or partners takes care of your patient at 2am when disaster strikes and one of the reasons it is so important to trust those people you work with. But that doesn't mean I'd be ok walking out the door at 6pm, KNOWING that one of my patients is on their way to the operating room for a takeback, because I had dinner reservations/wanted to make a yoga class/go to running club, and it is supposed to be my night off. That person trusted me to take care of them and taking someone back to the operating room is a bit different than modifying medical management. This is not me having a "hero complex" or being a martyr to my profession, it is simply trying to uphold the responsibility/commitment I made to the patient when I agreed to operate on them in the first place. Again, I see this as qualitatively different than those who never leave the hospital for fear of missing ANY case that comes in through the ED; after a 14-16 hour workday, I'm generally willing to let the call guy look out for the gall bladder/appendix/perforated whatever transferred in from OSH that we know is coming (but not when) if there's no sign of them at 6pm. But that is very different, to me, than leaving when I know someone I operated on is sick/unstable/having a complication, etc. Technically I COULD hand that off to the night guy - and the ACGME wants me to do just that - but that doesn't mean it is the RIGHT thing to do.