As in, you and the college can decide privately if they want to teach you XYZ in return for money from you. Getting tax payers to chip in brings in a 3rd party and then they have right to decide whether you get to learn or not.
I think the GP's point was that the college is also bound, privately by accreditation bodies and publicly by a duty to society not to devalue the meaning of a degree, to not grant you a degree in XYZ if you fail to learn.