Saw that Smith essay today and thought that it was a bit overblown in rhetorical terms, but in essence the idea is right. Its larger scope is that the higher education system turns out an astonishingly large number of heavily, heavily indebted students right out of college. I frankly think it's a pernicious dynamic. In that context, the for-profit colleges can be seen as different in degree but not, perhaps, in kind from traditional institutions.
Since the name of Kaplan has been raised, I can say that toward the end of the days when I fought in the test prep wars, they had gotten into the "college" business and were turning immense profits at it, to the point where the test-prep business basically became a sideline for them. I worked for a competitor who, for all its many faults, really did top to bottom believe, with very few exceptions, that our purpose was to help students and not fleece them. I was very glad that the question of following them into that business was never seriously considered. One of my coworkers in fact sent around a mock-ad for their "Quincy Medical School," where they would confer medical degrees by having students watch old episodes of Quincy, M.E.
Of course, the coda to all this is that the company eventually wound up getting acquired because it was in too much debt, and the founders and management were all forced out. Not that it excuses anything, but part of the reason for-profit education is viewed as sleazy is that there is a powerful political impulse that promulgates this view, and another part of it is that making money in education is so astoundingly difficult from a cost-control perspective that you have to apply a fair amount of sleaze to make the operation work at all.