You make it sound like it's hardly important at all but in that article, which has data from >100 ortho programs, it is
more important than the deans letter, your personal statement, participation in research, and publications. It matters.

Is it the end all and be all? No, but don't delude yourself about the power of a strong reputation. It's the gift that keeps on giving. Did you see what else made the list? Undergrad reputation.
😱 (I think I hear heads exploding)
😀
When you're trying to separate out the best of the best of the best at superior residency programs, you have to use everything. They get a huge number of applicants per spot. Most have the same general range high scores, class ranks, AOA, etc. You need everything you've got to get the nod to be able to shine at an interview.