You have named sports that aren't overtly native to one country. Yes of course the "US sports" have leaked to other countries, but they are the best at them and have a far greater following on TV, in league structure, in money pumped to and from. If the US turned its attention to sports away from what they host at home they could be world leaders in rugby, cricket, motorsport or netball, yet they're happy to just circle jerk themselves with what they already have. And I'm fine with that. They already smash athletics. I don't want them being good at everything.