This seems to me like a pretty dim view of the humanities in general. Research in the humanities is not in the same category as research in Computer Science, for example; there is often little to no free-market value. People who enter the humanities tend to do so (at least in my experience) because knowledge for the sake of knowledge is something worth pursuing. Your next company might not make a fortune knowing more about agricultural practices of the ancient Macedonians, or the concept of fatherhood in the music of Robert Schumann, but people doing that research aren't doing it simply "to advance their career," and not necessarily just to teach new people how to research either.
It has traditionally been the function of universities to foster this sort of research, as a general goal of "making the world a better, more knowledgeable place." It's a societal goal that goes way back: people say that humanity was set back something like 1000 years when the library at Alexandria burned down. This type of research doesn't fit neatly into any of your categories, and it is (I think) a more trenchant problem. Disillusioned humanities PhD's often have problems finding work in the "real world," since companies aren't keen on hiring someone who knows everything there is to know about Macedonian agriculture.
-- a fairly disillusioned Ph.D. student in Music Theory