Every thing has to be compared to something. When it comes to the NFL, "Sports Illustrate" compares all NFL teams to the last super team of the NFL. That was the Green Bay Packers under Vince Lombardi. You will never see a super team again in the NFL. The NFL has been so dumbed down since the 1970's.
Before 1970 just about every NFL player would have been a sucess in the private sector even if they didn't play in the NFL. They all actually had real college degrees in engineering, science, etc. Most of the NFL players back then didn't make big bucks like they do today, playing with the NFL was about the sport. And after their careers went into the private sector and were pretty successful.
( I can remember back during the 1970's at a bar and grill on Aviation Blvd. down the street from North American Aviation, Douglas Aircraft, Hughes, Aerospace, TRW, etc. and more than a few dozen of the former NFL players of the 60's and 50's who used their college degrees to work at these places as engineers, pencil pushers, etc. after playing with the NFL. These former NFL players were smart.)
Today those NFL players who didn't hire a financial consultant to invest all of the money they made playing football don't do to well after their NFL careers, just a step from living under a overpass. You have some pretty dull Christmas lights on the NFL Christmas tree today.
Today less than half of todays NFL players would have ever made it into the NFL forty five years ago.
There was a time when those who didn't meet the NFL standards found themselves playing in the AFL. Then one day some beard scratching types decided that wasn't right, it's discrimination. The AFL players should be able to play in the NFL. So they merged the AFL with the NFL and you will never see a super team again.
The NFL today is no longer about football. it's about money. It's a big entertainment business.
If you have the time and know what a book is, read some of the biographies of Vince Lombardi.