Incompetent at Judging Other People's Incompetence

You already know (even if you didn't) that the Dunning–Kruger effect describes how incompetent people may be too incompetent to recognize their own incompetence.

But were you competent enough to know that it also describes how incompetent people may be too incompetent to recognize the incompetence of other people?

So say for example you are a supremely confident person, in fact a member of the Supreme Court and you got these "friends" of the Court otherwise know as amici curie. They tell you they are competent in matters of high technology. For example, they inform you that gene splitting is just like plucking leaves off of a tree. You believe them of course. They are your "friends". Your very very competent and trustworthy friends.

(See page 20 of BRIEF OF GENEDX AND LAW PROFESSORS "... and for that matter, the first person to climb up a banana tree, pull down a fruit, and peel it would have merited a patent on “isolated and purified” banana fruit")