The life of an NFL fan is one of living through the good and bad times. It is about the suffering through losing seasons so when the winning starts, and hopefully the championship banners are raised, there is appreciation for the commitment. Teams like the Pittsburgh Steelers and New England Patriots have all measured their success against times of abject failure, rewarding their fans with consistency and Lombardi Trophies.
Being relevant gives the fan a reason to care.
Since Jeff Fisher and the Tennessee Titans defeated the Jaguars in the 1999 AFC Championship game, Jaguars fans have suffered enough losing seasons to warrant decades of NFL domination.