People are literally born into that misunderstanding all the time (because it’s not obvious). It’s an evergreen problem.

So you are basically saying you have no sympathy for young people who happen to have not been taught about this, or been guided by someone highly articulate in explaining it.

Is it taught in schools yet? If it’s not, then why assume everyone should have a good working understanding of this (actually nuanced) topic?

For example I encounter people who believe that Google literally sells databases, lists of user data, when the actual situation (that they sell gated access to targeted eyeballs at a given moment and that this sort of slowly leaks identifying information) is more nuanced and complicated.

It is taught in schools that everything you post online is public.