Cargo includes food, clothing, fuel, building materials and other necessities of life. Fucking with global trade causes inflation, which primarily affects the poorest people. Also, global trade underpins the peace and security of all 8 billion people on Earth. No one group has the right to disrupt the global system of trade over their petty local disputes. If they do, they should expect to feel the full wrath of the rest of the world. Frankly, I'm surprised that the Houthis are being handled with such a light touch so far.