American Sports and World Championships

I am married to a sports affectionado whose one of the dreams is to own the season box seats of every game in town...nice dream but hindrance is that I dream of going to all those games in Limo ;) very stylish isn't it? so you see, there's dreaming big individually and there is dreaming bigger jointly... so currently we settle in watching it on TV :( Anyway, I have been watching a lot of American sports on TV regularly, can make sensible comments about it..not only about size, clothes, styles, shoes, cheerleaders but also about strategies, play calls, schedules and what not.. anyone listening? :o Sports seem to be the passion of America. Every season, every month, one or other thing is on...Folks are extremely passionate about the teams...some probably live their lives with it..I sometimes wonder how can you be so much passionate about it? I can understand about players.they make their name, fame, money with it ...but fans? I may never know that... End of September is around corner and everywhere I start to hear about World Series..then comes the foot ball ( American football mind you, not Soccer ) and by end of January, we will hear about the World Championships. same for the Basketball and Hockey ( again ice hockey.. not the other hockey other parts of the world play) . The team winning the final game is called " WORLD CHAMPION" . News media goes gaga over it..Championship rallies , fanfares ...the hometown of World Champions goes fanatically crazy........No doubt, its very entertaining but I am curiously amazed by the title " WORLD CHAMPIONSHIP" ... how a game between two American professional teams ( sometime even across the town teams) qualifies to be World Championship? for sports like Baseball or ice hockey, half the world probably doesn't even know what it is... yet no one seems to mind it here... I wonder if it is confidence or arrogance ? The line in between is very thin... if you like it its confidence, if you don't its arrogance..Or is it reflections of decades of economic / military world dominance? Or a classic example of Big fish in small pond?