You're looking at skew.
Gyn Gyn mentioned this in another thread. I can definitely attest to this based on my own medical school's classes. we kept track as a cohort for each other and subsequent students.
that's 61% of people who even got to the point of applying. As in, did the exams, had competitive scores, did some research for more compeitive things, did their away rotations and got LORs. then did interviews. it can take years to accumulate all those things. It's another 20-30 k out of pocket. you have less than a 2/3 chance given all that work to get an offer. Majority of those offers will be in rural family med and rural IM. not surgery. very, very few will match into surgery.
it's highly skewed in Australia right now because a lot of people used to be able to stay behind in Australia.
As i mentioned in another thread. there was that option to not even apply if you didn't have the application together, which previously - majority couldn't even get to point of applying. it's not a joke, preparing for 8hr long board exams that can take a year to prepare for (the Australian system is not set up for you to succeed on American or Canadian boards) and then flying to North America to sit a live exam. not to imply that you're being flippant about the situation, but based on your post, I can't detect if you're taking this seriously or just starry eyed by a statistic without considering how arduous the effort is going to be.
if you're will to take the risk, and be okay with having FM or IM as fall back, then so be it. take the risk, in knowing what other posters on SDN have told you. but there is a chance you will not get surgery. that said, considering you're premed, rotations may change your mind later. have you shadowed a surgeon?