From what I've read, one of the biggest attractions of sporting events is the opportunity to bond with your fellow humans in a shared enjoyment of the spectacle. It's similar to movies, concerts and stage plays. It's not so much the action taking place in front of the viewers, but the social bonding of like-minded people enjoying a spectacle.
Or so I've heard. I'll stay home, read my books, play my games, and design Web comics.