> Right, but manufacturing's share of GDP is low as it has ever been.

That only means that we are creating more jobs than manufacturing can provide. There is no point in manufacturing more and more if current levels are enough. For an analogy, agriculture is only 2% of GDP but it is good enough to feed everyone. Increasing the percentage of GDP of agriculture is pointless.

That's different from having the "know-how", though. We have the knowledge and ability to manufacture a lot--as much as or more than any past point in time. We just "produce" a lot more stuff that isn't manufactured now as a share of our economic output.

In this context that doesn’t matter.