Education IS the cultivation and development of the faculties of the person being educated, especially those that are uniquely human. For this reason, the arts and music, literature and history, languages and the natural sciences, philosophy and theology ARE the content of education. None of them is an elective. To the extent that anybody lacks in any of these areas, to that extent his human faculties have not been cultivated and therefore to that extent I am not educated.
The point is not, in the end, to know about the subjects but to cultivate the human faculty that enables the subject. The danger of the preceding statement is in reaction, as though there is a dichotomy presented.