Then why does the Jones act exist and why is the US curtailing chip exports to China, and why does Mercosur want a trade deal with Europe? No, free trade is mu

Then why does the Jones act exist and why is the US curtailing chip exports to China, and why does Mercosur want a trade deal with Europe? No, free trade is mutually beneficial and the natural state of things, protection exists for two reasons. Pursuit of military interests (blockades) or satisfying domestic rent seekers. (e.g. the shipping industry, farmers etc.)