Because it turns out at least half of football isn't about football at all, it's about drama. Cheap, nasty, drama. It's the same as how nobody who watches Survivor gives a shit about surviving, and people don't tune in to Hell's Kitchen to learn about food, they tune in to watch Gordon Ramsay take arrogant cooks down a notch by calling them stupid donkeys.
NFL games are only played two days a week, usually. The rest of the week, football fans that would turn up their nose at soap operas, reality shows and celebrity gossip will cluster excitedly around the water cooler to discuss the latest Tim Tebow faux pas.
Of which there are many.
Here's some things any spectator can watch while eating popcorn, even those who don't know a third down from, I don't know, a cat maybe?