I'm not saying people don't belong, but that the feeling of insecurity, especially among young people, is more often than not justified.
Dunning-Kruger certainly has reached that point, you have to really dig to figure out if they're just throwing the phrase around or they're applying it in a thoughtful manner.
All sorts of phrases end up that way. "virtue signaling", a phrase I've never been a fan of has ended up that way too.
And now the meta-question: did I just…
I get the idea that it usually implies that the person doing so is being insincere but I honestly think the better way to do that is just say they're being insincere and demonstrate why.
Without showing why they're insincere it seems like it is just an empty phrase.
IMV DKE pop-psych is popular because it enables a kind of second-order superiority complex where you can say shit like, "Research shows that everyone who thinks they're smart is actually a huge dumbass. Actually the really smart ones are the anxiety ridden imposter syndrome devs like myself!"
At least overconfidence and naked condescension required some courage. The insufferable new meta-game of superiority signalling seems to be feigned humility and hiding ego behind the affectation of "knowing how little you know."