With the franchise structure of the NFL, the college draft, and free agency this should indeed be the case.
However, a pattern is developing whereby parity is fast disappearing and being replaced with predictability.
The above teams need total overhauls. Some need completely new directions, general managers, coaches, and even owners.
I would contend that an average Division 1-A school, say Florida State, would give some of these woeful sides a decent game.
As a Raiders fan, for example, I see no quick fix. There is a malaise afflicting the franchise that is both permanent in nature and seemingly eternal in timeframe. The current team has one of the worst assembled offenses in living memory.
It is sad to note that perhaps at no other stage in the history of the NFL have we had so many pathetic franchises.