It's like, cars (Score 1)

People learn the stuff they feel they need to know. I know almost nothing about the car I drive; I just use it to get from A to B. But in the early days of the automobile, that observation wouldn't have made sense: to get from A to B, you had to know how your car worked, because there was a pretty good chance it would break down en route. Of course, we still need some people who know how cars work, but unless that's your job or some kind of hobby, you don't need to be one of them.

Computers are similar. We've passed the stage when you need to know how they work in order to make them do something useful. Result: way more clueless people using them. And even among the technical types, increasingly reliable hardware means fewer of us need to know much about it. Just replace the appliance every few years, and you're fine. Most of the time.