I think I can do no better about answering the question of what it means to be truly educated than to go back to some of the classic views on the subject. For example the views expressed by the founder of the modern higher education system, Wilhelm von Humboldt, leading humanist, a figure of the Enlightenment who wrote extensively on education and human development and argued, I think, kind of very plausibly, that the core principle and requirement of a fulfilled human being is the ability to inquire and create constructively independently without external controls.
In fact, some of the biggest issues of the contemporary world can be better understood through the prism of the Arts and Humanities because these disciplines have important things to say about every aspect of human existence. The list is endless but some pressing examples that come to mind are terrorism and war; migration and multi-culturalism; security; privacy and freedom; environmental and digital issues; and mental and physical well-being. The Arts and Humanities both celebrate and challenge the expression of the human condition in its numerous manifestations and place human values at the centre of our world.