I see where you're coming from. But this is based on NFL talent. This isn't saying ones a HS caliber player. This is just comparing NFL players to other NFL players. I hear you all saying everyone in the NFL can play, well that's just not true. There are certain players who just can't compete in the NFL wether it be mental, technical, devotion, or just not plain skilled enough to crack a roster. We hear it all the time when players just CANT get on the field, it's not because he's so good that he couldn't get on the field. It's because he's not good enough to beat out the players around him, at least in the system.
Again 0 doesn't equal can't play in college, 0-10 are those guys who just aren't ever going to make it. They're not talented enough or don't have the physical stature to compete. Like an undersized CB or small DT. Etc. these scales would be in comparison to other NFL talent. Is there not a difference between Julio Jones, Martavis Bryant, Stephen Hill, Darren Waller, and Chris Conley? All of them are tall and fast, but all of them will not be superstar WRs. It's not just QBs, honestly.