We want the kids to realize that everything complicated is just a collection of simpler parts (until you get small enough), and those simpler parts are generally designed by humans, so there's no good reason why they can't be the ones designing in the future.
Other than they happen to live several states away from the established companies that do such designing. If you want to act in a Broadway play, you have to move to New York. If you want to act in a Hollywood film, you have to move to Los Angeles. I can think of a few Slashdot users who would claim that people who have no way to move to where a trade is practiced shouldn't even bother learning the trade.