I've always thought the Dunning-Kruger meme went: "The less you know about a given subject, the more you think you know, and vice versa", which I don't think is

I've always thought the Dunning-Kruger meme went: "The less you know about a given subject, the more you think you know, and vice versa", which I don't think is disputed by those graphs. It's just saying that people tend to overestimate their knowledge of a subject when they are under-educated and tend to underestimate their knowledge of a subject when they are over-educated. Of course, the study participants were asked to give their own estimates. What they were actually thinking of their abilities is a matter of debate that would need a more clever study to deduce.