Although I see where they were going with it, the way it's being used and defined seems more prisoner's dilemma than composition fallacy.
e.g. a niche pays very well, so everyone chases and gets certified for the niche, but because there are now so many applicants, they drive down the wages and make it no longer well-paying.
Or the modern college trap. It used to be that even a bachelor's degree in whatever was good enough to land you a middle-class job, so everybody flooded into the colleges and got degrees in whatever, but because everyone was doing that, the value of a bachelor's degree, especially in an unrelated area, is basically zero, and now you're in debt the rest of your life.
Oh, and fuckin' RIP, all you adults who are going to get rekt by a literal primary schooler.