You're not a "doomer", as I read it more like the opposite- your defense of global trade is optimistic. Trade and specialization doesn't work nearly that cleanly in practice.

Companies and governments saw the disruptions of the past few years and realized that there are unaccounted for costs (and benefits) to the global supply chain. COVID, shipping disruptions (strikes, Evergreen, prices), the chip shortage, etc. all have taught a lesson about the diversification of supply chain risk. Decentralization isn't less efficient when you include those costs. So it makes more sense now to make goods in America for America, and make goods in China for China. Not all goods, obviously, but the scales have shifted...and that's a good thing for the health of global supply.