Given the context, though, parent's comment is reasonable. The isolationist drive that would bring iphone manufacturing and all the associated mining back to the US would go hand-in-hand with a very isolationist economy, in which we'd presumably not be able to get anything from other countries.

The thought exercise of in-sourcing everything that ever contributed to anything that eventually goes into a phone helps to point out how the idea of disentangling ourselves from the global market is absurd.