Right but what's your point? That everyone should know these things? Maybe they should... maybe not. Yeah?
Maybe learning how to make repairs on a certain object is a waste of time and we should allocate our time elsewhere while supporting an economy of professionals whose job it is to do that... or just throw it away and buy a new one if abundance tech has carried us that far. The answers to these questions depends on quite a few variables that change all the time.
RE: You don't have to know how it works 99% of the time.