I know tons of people who have visited many US cities and not one of them went to see one of that cities major sports teams. On the other hand I know several people who don't live in the UK yet travel to London or Liverpool at least once a year to watch their favorite football team play. What does that prove?
Fair, my thought process was more around "how many people wouldn't know about London if their sports teams disappeared?" And my intuition was, "not many, because London is a global city for lots of reasons," but it's possible I was wrong about that and some people only know about London because of their EPL teams. The thought feels very odd to me.
Obviously nobody 'only' knows London because of their sports team. But that is different from saying that London doesn't have many globally well known teams or that there aren't a fair number people that travel to London from all over Europe primarily to watch those teams play.