As far as I can tell all of the people quitting have achieved precisely fuck all. Not a single example to the contrary I can think of. Not at a big tech company (at a startup maybe).
Interestingly every time this topic crops up there's a chorus of "just quit if you feel that way about it" as if the exact opposite was true although in reality I think everybody kind of knows it's really not.
From a non American perspective it's really strange watching this play out. Like looking at a culture that cant see the color blue or something.