America underestimates the difficulty of bringing manufacturing back

Its the integration and overall combined effect of the entire industrial pipeline that makes China so incredible. It processes all the raw materials and the recycling/reuse of off cuts through every possible way to turn those raw materials into components and then into goods with very little need for import from other countries. Its the complete system for a huge variety of goods.

To compete with that the entire pipeline from raw materials through components and final product needs to be reproduced and its taken China 40+ years to build up to this capacity and capability.

I think its something more countries should consider and do for certain pipelines but we are in a world with vast international trade and the winner(cheapest) takes most of the trade so whatever it is needs to be worth while within country.

Absolutely. Canada for example should not be shipping lumber and oil to the United States for further refinement. It should be processed domestically.

Canada and the US are long time allies and should be able to benefit from eachother without much hesitation. China is an adversary, big difference in posture.