No, that logic doesn't apply. The US will not sink ships that send oil to Cuba. Nor will they charge any fee to the country sending oil to Cuba. Unlike your exa

No, that logic doesn't apply. The US will not sink ships that send oil to Cuba. Nor will they charge any fee to the country sending oil to Cuba. Unlike your examples, there is is no threat of violence at hand here. What is being threatened is that the US will charge Americans higher tariffs on goods imported from the countries sending money to Cuba. Fundamentally, an embargo is an economic lever, whereas your examples are threats of military action. There's a very substantial difference between: "If you don't pay us money we'll shoot missiles at your ship and sink it." and "If you send oil to Cuba we'll charge tariffs when Americans import your country's goods."