The liberal arts in theory could indeed make valuable contributions to the education of the young, as our English professor claims. But the liberal arts in practice have in fact done the opposite, not just in the United States but in other countries as well.
The history of the 20th century shows soft-subject students and their professors among the biggest supporters of extremist movements, both fascist and communist — the former in central and eastern Europe before World War II and the latter in countries around the world, both before and after that war.
Those who want the liberal arts to be what they were supposed to be will have to profoundly change them from what they have become. Doing that will undoubtedly provoke more denunciations of critics for “trashing” the liberal arts by criticizing those who have in fact already trashed the liberal arts in practice.