At least for myself, this manifestation is not "oh i don't want to be a bother", it's "if i ask questions {my peers will sneer at the idiot, my boss will take note that i'm disposable ...}".
This failure mode has, at many times over my academic career, been really vocally reinforced by my peers at the time. It's extremely damaging, really stupid groupthink that usually winds up with a silent classroom of people too cowed or proud to admit that they, the student, don't already know the material that they're here to learn. And it produces engineers who have to consciously force themselves to not do that, in industry. Like me.