Are you merely trying to see if I understand the concept of a external benefits or genuinely trying know what possible external benefit there could be with some

Are you merely trying to see if I understand the concept of a external benefits or genuinely trying know what possible external benefit there could be with someone being provided a subsidized education? I'm trying to know what external benefits you think exist and why you think they are uniform across all fields of study, which is a much stronger claim that you made. I cannot think of any such benefits. E.g., one might hypothesize that people in college develop useful skills that benefit others in a manner they cannot capture as wages. But it's a little crazy to suggest that a women's studies major develops those skills to the same degree as a nurse.