What you've written there would definitely be an exaggeration for the UK. I would guess that most university-educated British people would not be able to point

What you've written there would definitely be an exaggeration for the UK. I would guess that most university-educated British people would not be able to point out more than a couple of US states on a map. Very little interest in US sport here, as far as I know, except perhaps tennis and maybe golf, for a minority of people. As for films and pop music: hard to say, seeing as the same films and songs are probably being pushed here. Of course, a significant proportion of university-educated adults have no interest in films or pop music and couldn't name a single recent pop song from their own country (though they'd be able to name songs that were in the charts when they were teenagers). US trivia finds its way very easily into UK news. Probably lazy journalists take anything off social media that is in a language they can understand and copy-paste, with the result that in the UK media there is more of that kind of story from the US than from the UK. Trump's antics get reported. I'm not sure British people are generally aware of there being any other politicians in the US.