You seem confident in that opinion. I just don't see an established NFL head coach going to the college ranks. The only ones you see going to college are the failed coaches (Wannstedt, Gailey, Carroll, Callahan, Sherman, etc). I can't think of any established, successful NFL coach going to the college ranks just for the heck of it. You also didn't see a lot of guys earn FU money in just a few short years and then go into semi-retirement for extended periods of time because they didn't have to coach anymore. Not everybody is dying to do it. But guys are willing to sit out of the NFL for multiple years and work tv gigs, so obviously being an NFL head coach is not their one and only option for employment.