It is not just oil that travels through the chokepoints. How many items in your home were made in china, India, Taiwan, etc. Things like iPhone/pad/pod, or clothing (most are sewn in Asia). Any US exports also have to travel the seas unless they are going to Canada or Mexico. Do you like fresh fruits and veggies in the winter? Those are usually grown south of the equator in countries like Chille and Argentina, and arrive in the USA by ship. There are many aspects of our very comfortable middle class lifestyle that depends on international trade.