i agree that basketball is a fairly big sport outside the us. however from memory the europeans are good at it at ilympic level.
Which is because the rules are different, and the Olympics are an afterthought for most American players.
lucrative sport? well in the top football leagues in england, italy, germany, france and spain it wouldnt be wrong to think that the average player in a top team earns 5-6 million dollars and the very best up to 20 million dollars a year.
And it also involves them moving overseas, not to mention, when is the last time you saw a top tier American soccer player? There aren't any, because they don't have good competition to play against, and they'd have to move overseas very young to find that.
as for the world series in baseball. well i dont think many countires have top teams because tis just so boring. so thus the only good baseball league in the world is in america and thats where they can only go.
The same argument can be used for Americans and soccer. They find the sport boring, don't have good leagues, therefore don't play. The fact is, the best baseball players in the world play major league baseball, so it can legitimately be called the world series.