That's because the concept which is even more impactful than agriculture and the computer, and makes them and everything else in our lives, is abstraction. It makes it possible to reason about large and difficult problems, to specialize, to have multiple people working on them.
Computer hardware is as full of abstraction and separation and specialization as software is. The person designing the logic for a multiplier unit has no more need to know how transistors are etched into silicon than a javascript programmer does.