I went to college for academics. There was no feeder system for my future profession. I had to figure it out for myself. I had an academic scholarship for tuition but had to take out loans for room,board and books. Shabazz gets tuition,room and board and I assume books are covered. Also, if he is good enough he may play in the NBA. Even if I were good enough as a BIO major there were literally tens of thousands of us who had to figure out own future profession. Athletics is an opportunity to get a free college education and maybe the chance to play in the NBA. Everyone knows the NCAA is a racket and those who don't like it have the chance to do something else. I find it very hard to believe the parents can't contribute enough for a kid to buy the proverbial pizza once a week.
There is certainly a difference in the amount of aide received, but I don't think you can necessarily call college athletics a feeder system that is any different than that for accounting or biology. Was there internship or co-op opportunities for you? If so, where you offered a job at its conclusion? If so, could that be considered a feeder system? I believe it can.
Disregarding non-revenue generating sports for a moment, even if a high school athlete gets an athletic scholarship, about 1% are as fortunate. Further, about 1% go on to that sport at a professional level. That means less than 1/100th of 1% of high school scholarship athletes are fortunate enough to play in a pro league and have that occupation sustain them as their sole livelihood. The numbers get even more miniscule when expanded to the non-revenue generating sports (e.g. I'm pretty sure that field hockey is not one of those sole-sustaining careers).
I'm more or less against any pay-for-play scenario (even if it is a few hundred dollars per semester), unless it can be applied equitably. The NCAA has already demonstrated that they cannot equitably regulate current infractions, let alone additional rules for an entirely new system. Even if they could, any amount of money is not enough. It is a widely held notion that Johnny Manziel comes from money, yet he still sold his ink-penned signature for $10,000.