Baseball has Steady Eddie and the Candy Man. The NFL's style of play has been stagnant for decades, predictable. Teams seems interchangable. Even the wishbone is too radical. Baseball teams' styles are often determined by their personnel and even their parks.
Football fans tailgate before the game.
No baseball fan would have a picnic in a parking lot. At a baseball game, there's almost always some new wrinkle. Beneath the NFL's infinite sameness lies infinite variety. But we aren't privy to it. From the stands, we don't know one thousandth of what's required to grasp a pro football game.