US shipyards can barely keep the Navy equipped. Can a US shipyard even build a supertanker? Off the top of my head, Newport News builds the biggest in the country. They have one large construction drydock, which is usually occupied by a carrier for the Navy. There is a yard in Wisconsin that builds Lakers, but the larger Lakers are too big to get through the St Lawrence Seaway, so are stuck in the lakes.
Thinking that the US can build a significant number of large, commercial, ships, in TIG’s lifetime, is probably a pipe dream.
Steve