The methods used 30 years ago won't work.
If American production was optimal, or even economically feasible, it would already be in place. Take, for example, textiles.
Why would an American business go through the hassle of getting a foreign company to make textile products, get them shipped across vast oceans, taking weeks if not months to do so, only to have them in stores in relatively close proximity?
We all wear clothes and purchase them regularly. So why are they not now largely made in the US?
Probably.
Sometimes exploring the implications of an ill thought position leads to an unpopular conclusion. If the worst result is a few people hit a down arrow and others contemplate the exploration, so be it.
There are many worse things in life.
Factories are bad for the environment and provide shitty jobs.
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.
But, yeah, the current American approach is anything but sober.