The NCAA is a cartel simply because if you don't go to college, you can not play in the NFL or NBA (unless you take a massive risk and play in Europe). The players have no choice. "Too bad, that's the way it is" does not sound like the talk of a person who believes in a fair market.
Let me put it to you this way. In a free market the athletes will get paid what the market says they are worth. Right now there is a cap on the market which is: A scholarship. Each team has a limit on how many scholarships they can give out. Each team also uses every scholarship they have available on an athlete (which they are not required to), which tells us that at the very least the market value of even a benchwarmer is a scholarship.
If an education is truly enough, and worth the player's market value, then let's have a free market and see if this is true. Right? If an education is good enough then the market will naturally set upon a scholarship as the cap. That's fantasy land. We both know that if a free market is allowed teams will start throwing cash around to get each player to stay with them. This tells us that players are worth A LOT more than one measly scholarship to these schools, otherwise they would not be looking to skirt the rules with boosters, etc.
I think the "be happy with your education and shut up" argument is incredibly condescending especially when coaches and NCAA officials are swimming in money. Scholarships are not magical unicorns with wings, they are merely the value of tuition. Were basically giving these players $20,000 a year. Then punishing schools that give them a penny more. Please stop glorifying scholarships, especially in an era in our country where a college scholarship is worth less and less.
These players are worth a lot of money to their schools. Much more than a measly scholarship and everybody is profiting off their blood, sweat, and tears except the athletes. It is true that most of them will not make the pros. In fact, this will be the only point in their life with which they can make money off their sport (much more than many careers they can ever get with their "glorious and invincible scholarship" . And they are not allowed to. Why?