To also play devils advocate here, it is one of the few things keeping many kinds of manufacturing alive in the US itself, such as metalworking and ship buildin

To also play devils advocate here, it is one of the few things keeping many kinds of manufacturing alive in the US itself, such as metalworking and ship building. To lose all the knowledge that comes with that would be a disaster, as we would have to rely on other, possible hostile, countries to provide those goods. At least by having some of this expertise and machinery inside the country we could ramp up training and production if needed.