I'm playing devil's advocate here and it won't be long because I need to get to bed but as much as I agree with you that competition is dumb and I don't expect it anywhere near the degree undergrad has been in med school, the point is that if you want to be able to give the best patient care which is, I agree, the primary goal, then you want to aim for the best possible training program. The only person you should be "competing" with in med school is yourself, but residency, like medical school, needs some way of analytically assessing the available candidates so they can pick students who are both right for their program and have the highest possibility of succeeding in it. Grades are just one of those ways of gathering information and forming a picture about someone. In a perfect world, should arbitrary grades exist, and by extension, be an indication of the "quality" of a person? No, of course not. Do we live in a perfect world? Far from it. Unfortunately, as much as one hates the game, one is still often forced to play it. That's the entire pre-med path, in a nutshell, actually. I think that you'll find if you pursue ortho you'll be grouped in with a bunch of people who have no scruples playing the game, and playing it hard. To take an ideological objection to the game and refuse to play is great, but maybe not necessarily in your best interests.
Edit: Reading back over this I want to make sure that nobody confuses this sentiment with "gunner"-ness. I think that sabotaging people so that you can look better is beyond evil. I think that grades on a curve, where only the top 10% can get an A even if 15% have above a 90% in the class, is beyond evil. When I say "play the game" I mean that in the sense where as med students we operate in a certain environment with parameters that measure our success, whether they are step scores, clerkship grades, evaluations, etc. Competition for me is not about going out of my way to not share materials with you or make sure that you miss key points of information. It's putting my head down, challenging myself, and trying my best to achieve personal success within those parameters. Just my two cents.