I think this is a really fundamental computer science thing people whose names are not "Alan Turing" have to be taught (ideally in gradeschool) but few are. In many fields, the more expert you are, the bigger the wall of tools you have. (48 wrenches!!!). But a computer can literally become any other computer. That's fundamentally awesome and, for many, hard to understand.

Knowing that a particular interface is almost completely accidental is often the key missing piece in going from being utterly helpless to solve a problem to being able to puzzle it out.