Next to no kids in other countries dream of being in American football.
Basketball is a different case - players from all over the world dream of being in the NBA
And Baseball - Dominicans, Cubans, Japanese and South Koreans aim for the American leagues.
Global audience for the Superbowl is practically non-existent. However Global audiences for American basketball and baseball are huge
Would you say I take cooking seriously if you saw me pop popcorn in the microwave? I doubt it. Would you say I take cooking seriously if I spent two hours cooking a four course meal? You probably would. Then how can turning on the TV to watch a game be at all compare to spending half a day or an entire day to attend a game?
Fairweather fans who just watch a sport on TV can't be counted with half the weight as those who fill many 100+K stadiums on a Saturday to see college football games in person. Until people in other countries fill 100+K stadiums for their sport of choice I'm counting them as not even half as interested as the 100+K Wolverines fans who fill their stadium, while 100+K Auburn fans fill their stadium, while 100+K Bama fans fill their stadium, while 100+K Vols fans fill their stadium, etc. for however many of them have home games that Saturday.
Next you'll equate the bandwidth used for porn as evidence than men must deeply care about women. LOL