People who downvote the above comment: please provide an actual response.

The comment isn't wrong about factories. Factories are far less productive than providing services (e.g. software), and per comparative advantage the US should be importing manufactured stuff and exporting highly labor-efficient services.

If the US expands its manufacturing without it being profitable to do so (profitable without state subsidies, I mean), that will be bad for the economy , because it will drive up the cost of labor for other stuff without an accompanying flow of profit into the economy to stimulate the demand to match said higher costs.