Because you can be a great "football player" and succeed in high school, but fail in college. You can be a football player & a decent athlete and succeed in college, but FAIL in the pros.....got it? Lots of great football players, couldn't handle the pros...some do, through hard work and dedication...Some great athletes, have done very well in the pros....You continue to draft on upside....look at G-Rob...Look at Goff even...Pros are different...You need superior athletes, at various positions to be successful. Or, you'll be out of a job...
superior athletic ability is an end all, be all...You then need to be consumed by the game...countless hours of film study on your craft...countless hours honing your skills...countless hours taking care of your body(diet & conditioning)
They hold a combine for a reason....There is a reason JJ Watt, Gronk are who they are...Look at Aaron Donald..superior athletic specimen...Best player on team...why??? why??? I'd guess, his speed & power, plus, the work ethic...You put about 10 more of these type of guys out there...then, my son you become a man...oops, movie reference....then you become a contending team...