Most who went and spent a fortune for a useless degree would have been better off going to a trade school. 
The proliferation of useless degrees started, IMO, with universities creating ______-Studies programs and majors back in the late 1960s and early 1970s. What career path is there for a person with a BA in
Eskimo Studies or
Ambi-Sexual Walnut Studies?
The other side of the coin, though, is that starting in the latter half of the 1970s(?), employers decided they wanted grads with degrees directly relevant to the employers' business. BAs in liberal arts major - History, Literature, Philosophy - even if not politicized or sexualized were not in demand. To the degree universities even recognized this shift, they doubled down on the un-demanded majors.