I agree that most users won't be able to follow Winapps' guide, but "The entire point of an operating system is to make computers usable without knowing how they work" is just false. That is the point of an OS for computer illiterates, not the "entire point of an operating system".

Arguably, the vast majority of users are "computer illiterates", and an OS should cater to the majority. So in a sense, OP has a point.