It makes American products more expensive for other countries and American based companies then also lose money when they exchange foreign profits into US dollars. It's actually pretty simple.
I agree with what you were trying to say overall though, that this is (sort of) a flawed way to look at our class because most of those ratings done in comparison, so we don't actually know where guys not in this class would land. However, the reason it makes sense is because it IS our true class. These guys graduated high school a couple years ago but are just now starting to play basketball as freshman. Either way it's just an opinion and it's easy to see either side of why it is or is not a reasonable argument.