What Socrates understood was that wise people exhibit humility. Educated people usually exhibit such humility because they understand how limited their breadth and depth of knowledge is. On the other hand, neither the proudly uneducated nor the proudly educated have such a trait. Of the two, at least the latter is easier to reason with than the former.
I’m not actually sure that “education” writ large is useful for helping people understand the fact that the world is complex and can’t be divided into simple good-bad dimensions.
A number of other things that aren’t traditionally considered to be education would have a better effect, I think. Things like living abroad, making friends of different social classes, reading books by people that you strongly disagree with.
I take it our definitions of "education" are different. I do not refer to academic education.
Everything you expressed are forms of "education", and the core tenet is putting aside your beliefs and attempting to understand a different point of view.
This, by construction, requires humility because it implies that the person has something to teach you. This identical to pure-land view [1], where every person you meet in one way or the other is a small Buddha[1], enlightened with something you can learn, if you only set aside your existing beliefs and listen.
I think it boils down to your definition of "educated". I wouldn't call somebody with say a bachelor's degree, or post grad degrees necessarily educated.
I have met plenty of "educated" people who live in total ignorance of their surroundings, and plenty of seemingly uneducated people who consume knowledge like the air they breathe.
The qualifier "proud" makes all the difference.