Because the NFL profits from their future players getting 3 years of practice and no coaching at no cost to them. These are players who sacrifice a lot and most of them get chewed up and spit out by the machine, while the NFL rakes in millions upon millions. Baseball is doing just fine with their minor leagues, I think it is reasonable to hope that the NFL would pay a stipend to the players it profits off of and the ones who get chewed up by the system they support.
"The University of Illinois is also in turmoil. The university sports an Interim Chancellor, an Interim Athletic Director, and an Interim Football Coach; the game will be played at Soldier Field, making this an Illini Interim Home Game."