I think you missed their conclusions. The problem wasn't that China was a lot cheaper. The problem was that substantial subcomponent or process vendors only exist in china. Like, they could find American sheet metal stamping companies but they were all using custom tooling made in China because American tooling doesn't exist anymore.

Tooling is a high-skill trade. America used to be amazing at tooling. What's more, tooling isn't super cost sensitive because one tool can make thousands of parts.

When outsourcing to China began the tools would be made in the USA and shipped to China for the low-skill work. But over time those Chinese manufacturers figured out the tooling. What's more they realized that controlling the tooling would let them control the whole process.

They started doing things like, for instance, including the tooling in the price of the product so you don't even see it, if you use their tools. Just send them the cad file and they'll do the rest. So American tool making went away. But this was a conscious decision on the part of the Chinese manufacturer and an unconscious decision on the part of American importers who didn't really value their in-house expertise.