> And they were right. American manufacturing is $3 trillion/year, second only to China, and 1/5th of the entire world.

Values are 2021 because that's the most recent available for US at the same source, to keep consistent.

World Manufacturing output: 16.16 trillion https://data.worldbank.org/indicator/NV.IND.MANF.CD

US Manufacturing output: 2.5 trillion (15.47% of world) https://data.worldbank.org/indicator/NV.IND.MANF.CD?location...

China Manufacturing output: 4.85 trillion (30.01% of world) https://data.worldbank.org/indicator/NV.IND.MANF.CD?location...

Whatever analysis you make, let's use the correct numbers, from which you were off by about 1/5th. Should you think that is a negligible margin, you'd have to consider the US participation in global manufacturing output as similarly significant.