It's a double edged sword. By crafting interfaces so simple anyone can use it, we forbid them to understand what's really happening. That's how people end up thinking the blue 'e' icon on the screen is Internet.
But is 'forbid' really the right word here? I certainly agree that such interfaces encourage people to "accept without questioning", but it seems that there is no necessary obstacle to making something that's easy to use but also permits you to dive under the hood and see the details. (I think particularly of Mac OS before it started becoming all iOS'd. Even now, when Apple's 'just work'ing settings don't just work for you, you can often fix it by diving into the command line.)
IMO, no actual mainstream OS gives ability to understand anything, even UNIX based. And I don't believe command lines are a way to understand either, or a very low efficiency one (gotta read a lot, understand complex context, try mistakeful commands).
You need virtual, mockable, undo-able environments to understand. You need ways to decode the data and metaphors used by computers.
