You seem to be assuming that more education implies better informed voters which implies no Brexit. But it was the best 'educated' voters who took the dire eco

You seem to be assuming that more education implies better informed voters which implies no Brexit. But it was the best 'educated' voters who took the dire economic warnings of the cost of voting leave most seriously, which have since been proven false (e.g. no 800,000 lost jobs due to uncertainty post-vote). So there's an easy argument to make that huge numbers of remain voters were just, as you put it, "unquestioning individuals that are happy to go along with whatever they are told" i.e. they were to vote remain or else economic disaster, didn't question it despite the obvious holes in this story, and did as they were told. Leave voters thought for themselves, concluded the risks were exaggerated and didn't do as they were told.