The NFL doesn't need parity. There's only one game a week, and for many of the fans who attend the highlights are the pre-game tailgate party and the post-game tailgate party.
And really bad football teams somehow acquire an entertainment value all their own.
'What do you think of your team's execution, coach?' 'I'm in favor of it.'
Fans with paper bags over their heads.
The Aints.
The Jets.