The Supreme Court has already ruled that players put colleges/NCAA under anti-trust laws, and Kavanaugh's attached opinion made it clear that they've opened the door to extending the context of those anti-trust implications.
I'm not sure why people are arguing against that. I haven't been inventing these points or their analogies. They're directly from Kavanaugh and the SCOTUS.
ETA: I'll reiterate. Note the use of "businesses", plural. This isn't an argument about whether a University has to pay student athletes. It's about all the universities conspiring to prevent the possibility. There's nothing wrong with a university fielding a team by simply offering scholarships. But when they all create a system that prevents better than that, then it's a problem.
Kavanaugh specifically spoke to the "band members, etc" argument when he said that no other industry could make such a circular argument to prevent paying (as he phrased it) "workers".