I don't think so. Sports are just another form of entertainment, and people like to be entertained. I don't think they are really any different than people who get attached to movies, actors, music, and musicians. If it is what you are interested in,then you are going to form some sort of attachment to it.
Of course there are always going to be people that take it too far, but those sort of people are in society regardless of how much importance sports gets.