Which then keeps at least BASIC knowledge of shipbuilding available in this country, should we suddenly require grow in that industry (which is crucial). You are either misleading the purpose of this act or are willfully ignorant.
Correct: this is also why we ban importation of foreign food, so they Americans can keep at least BASIC knowledge of agriculture. Similarly, we require that air transportation in US is only done on US made planes, so that US keeps at least basic knowledge of building planes. Without these measures, those industries would be gone.
Jone's Act doesn't protect any shipbuilding facility, beyond the existing government contracts forwarded to them.