When I have a problem with my car, I take it to a dealer or a certified repairshop. I effectively know jack-all about the workings of that machine. I can be easily conned into paying for repairs that don't need doing. Do you wish to claim that no such context exists for you?

It's easy to gloss over the fact that for >99% of users the machine "just needs to work", and I don't think that's unreasonable. There will be a subset of kids that /do/ take an interest in this stuff, and will pick it up as the next generation of "IT magicians".