I disagree. If it can be built, it can be known, top to bottom. Not everyone may want to know all the gory details, and nobody wants to get called on to explain it, but it can be, and should be done as a matter of course. The issue is that the industry will kick and scream to keep from being held accountable to providing the customer with a way to be able to parse that information, and no one wants to hire people to…
It would take many human lifetimes to learn how your computer works from the web frontend down to the semiconductor physics.
I'm fairly certain I could explain the whole thing, all the way down, to any sufficiently interested person.
I'll never forget the day that my chemistry professor explained how a transistor worked... no quantum mechanics required.
Sure, I'd have to look some details up, but if I can learn it, so can you.