For the record, I'm a reapplicant.
I went to college to do ortho
I went to medical school to do ortho
It was ortho or bust. When people asked me what my backup plan was, I told them "Ortho. I will do whatever it takes, research, surgery, prelim, etc. But my backup is Ortho." and then sometimes they would ask "what if you don't get it after that.?" .."I'll keep trying until I do. I'm young."
Orthopaedics is one of those fields where you typically don't 'fall into'. It's not like medicine, where people accept that you want to do 6 different things because you want to help people in general (which is admirable). It's a demanding residency and lifestyle.. you have to really want it, otherwise you'll be miserable.
Don't get me wrong, it's wise to have some form of a backup plan, but it should be to backup your ultimate goal. For me, it was ortho, so my backup plan was research. But, if you're undecided, then you should really think about it, especially when it comes to ortho. It's a huge commitment. Anyone can match into ortho, it's a matter of how badly you want it. I've seen low step scores, no honors, unheard of med schools, etc. and people still match.. I've seen high scores, perfect records, and people not match.. it goes both ways.
No matter what you do, you should do it 100% in life. If you're going to apply to ortho, but don't think you have the grades or whatever, go full force, give it your all. don't say "i'm going to try, but if I can't get it then I'll just do ER." If you do, you're just going to set yourself for failure.
I dunno, it sounds preachy, and actually egotistical about the specialty, but I guess what I'm getting at is that any surgical subspecialty is a big commitment, and there's a huge difference between ER and surgery, as opposed to say Ortho vs Neurosurgery (in terms of life commitment, not the actual discipline, hehe.. b/c we all know they're way different.)
Good luck in whatever you do!