Seems to be grasping at straws to me. They separate NFL and NCAA football. They also do the same to basketball. Football and basketball have a giant core group of fans. Soccer is a niche sport, like hockey, that will always have a loyal following, but will not take over traditional American sports. Over time, the distance between soccer and hockey will happen in soccer's favor because it doesn't take money to be able to play the game...Similar to basketball. Poor kids (Hispanics) can play soccer because it only takes one ball and a some open space to play.
When the best athletes in the US decide to play soccer as their primary sport, like they do in Europe, it will always be the sport kids play who couldn't play any other sport.