So are the factories highly automated or not? If so then there aren't "assembly line jobs from the 1950s". These are highly sophisticated factories, with the latest automation, AI, tooling, etc.So in summary, both things I said are true. Americans don't want assembly line types of jobs AND those jobs have been supplanted by robotic labor. What Americans DO want, are affordable products in the market.
You can argue that prices will go up and the whole thing isn't worth the payoff.
But you can't argue that these are assembly line jobs that Americans don't want and that the factories are highly sophisticated and automated with high tech. Those two things simply cannot both be true.