Hyperspecialization?

E.g. Sherlock Holmes not knowing of the heliocentric model.

For this to be the case, it need not imply that most members of the hyperspecialized masses have very deep knowledge in any one conceivable area.

Zoom out far enough and I'm sure that a spectrogram of one individual's knowledge would look identical to everyone else's.

Shock or ridicule: the root of it is the perception that another or many others are ignorant of what seems to the one a very fundamental or trivial (i.e. "obvious") fact or concept, e.g. that every citizen of a given country should have familiarity with the geographies of at least their country at large.

Compulsory education: its basic purpose is to inculcate some facts and concepts that are deemed by society to be fundamental or trivial, along with tools of critical thinking and continual acquisition/absorption of new information. The problem is, there are just way too many fundamental or trivial things to learn: long-term retention is unreliable, cognition under-equipped, and life short and busy. And this is even sidestepping the problem of evaluation.

It is a truism to say that if one is reminded or made newly aware of something that they then consider or have considered to be fundamental or trivial, they will almost never find fault with others' ignorance of the same.

TLDR: All these reports on selected ignorances are pretty much just there to amuse you and to boost your self-satisfaction. What sort of vegan is a vegan who delights in the flavor of "vegetarian meat"?