Earlier quoted context omitted.
"insulate the US shipbuilding industry from international competition, leading to them resting on their laurels" This is what I don't get. The Jones Act is about keeping ship building at home, in the US. So protective. By locking out foreign competition. It's a 'protective' law, to isolate and protect US industry. How will opening the US to buy and operate foreign ships, somehow make the US build more US ships? Look…
If you are protected from facing competition, then you don’t need to actually compete. Therefore, you don’t develop the competitive advantages. You remain at a competitive disadvantage, but it doesn’t matter since you don’t actually have to face the competition… until someday when the protection is removed and you are left to face the more advantaged competition.
You mean like all the (e.g.) garment and other factories competed against foreign manufacturers… and the companies decided to close up shop and move overseas?
The main garments that are still made in the US are those for the military due to domestic production regulations in procurement rules.