Right but what's your point?
That knowledge is an advantage. If you know how to fix/repair things, you can save time and money on professionals. And you can also avoid the "throw it away and buy a new one" mentality. I do not say that people should know how any of their things work. It is up to everyone what they learn or not learn, and what they do with it.
RE: You don't have to know how it works 99% of the time.