I believe the reference is to the recycling of coaches proven to be mediocre. Happens in baseball too.
Old coaches are fired and new ones hired because the team stakeholders think it’ll improve their chances at winning games, winning championships, etc. In the case of the NFL though it looks pretty hopeless this next decade for all the rest of the teams besides the Dallas Cowboys since they are obviously the only team deserving to win a Super Bowl for the next decade or so. Now I do make this claim as a Dallas Cowboys fan, though I probably am more objective about the Cowboys than the MSM is about political leaders ;)