Sure, but that's an argument against abstraction/specialization that is also somewhat hard to really buy into.

How do you smelt bronze? How do you grow crops? How do you build a lean-to?

Knowing how to do all those things does give you a very intrinsic understanding of a lot of things, but it's probably not wise to force everyone to learn those things.

EDIT: Apparently you don't smelt bronze, you smelt pure metals out of ores. lol.