The last book that I am aware that was detailed on this issue was called College Sports Inc, Written by Murray Sperber
From my understanding you are mixing up your accounting terms. Revenue generating vs. profitable. Many schools make up shortfalls in athletic programs especially football by increasing student fees. They hide their losses by attributing many of those expenses to the University itself and generally have no clue on what a profit loss statement is. Yes they are revenue generating, but with a few exceptions they spend more than they bring in.
That being said if there were not TV and merchandise contracts with the Universities, I agree this line of argument to pay the players would be a moot point. But as long as someone is making money off marketing the image of these players, I believe they have a right to compensation for it.