However, it's not uncommon for a company or industry to fail to develop a competitive advantage, and then go bankrupt and disappear.
Without the Jones Act, it's quite possible that the US shipbuilding industry may have ended up even more moribund than it is now, decades ago.
Without it, we probably wouldn't have a thriving US shipbuilding industry, but we would have significantly (probably orders of magnitude more) intra-state shipping, which would require more ships that would most likely come from close allies which would boost _their_ shipping industry.
For strategic purposes, obviously having our own shipping industry would be better, but that's apparently not on the table. I'll take, as a close second best option, an improved shipbuilding industry of our allies, with a heaping side helping of massive economic benefit.
But, not seeing how allowing foreign built ships, with foreign crews, owned by foreign companies, somehow leads to a stronger US shipping industry.
(Nuclear option: US Navy ensures Freedom of the Seas only for US flagged vessels. Your Liberia-flagged ship gets attacked by pirates, or even some state actor? Ask the Liberian navy to come to your help. And no, this isn't really a serious suggestion that would be in the US interest.)
Guess this thread overall had devolved into 'just repeal' and let the 'free market' toughen up the Americans that have gotten weak. Free market will sort it out.
Subsidies and Investments are correct, but deemed 'bad' by the people wanting to cut government.
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.
Steel making and ship building are done with heavy machinery, at least to a sufficient extent that I would expect wages to matter less.
There are industries the US should support for defense, you don't want to be buying your weapons from your enemies. See the drive to bring Chips back to the US.
Allowing wonton outsourcing is finally being seen as maybe not a forgone good.