The thing is, if one wants to make a career out of one of the international styles, one pretty much has to start dancing as a child. And by that, I mean that one had best already have years of experience in by the time one hits 14. There are exceptions, but they're rare. As such, there are 14 year olds who are way past the point of worrying about steps.
Now, one might argue that these dancers tend to be in amateur rather than pro-am partnerships. And that is true for the very best of them. But junior pro-am is a thing, and almost exclusively populated with female students and male pros. (Boys who are willing to seriously pursue dance are a difficult to find.)