Because football is built on an economic model of fairness and opportunity, and baseball is built on a model where the rich almost always win and the poor usually have no chance. The World Series is like Real Housewives of Beverly Hills. You have to be a rich bitch just to play. The Super Bowl is like Tila Tequila. Anyone can get in.
So, you kind of have to laugh - the same angry white males who hate Obama because he's "redistributing wealth" just love football, a sport that succeeds economically because it does exactly that.