On Monday, six weeks into its war with Iran, the United States imposed a naval blockade of the Strait of Hormuz. According to conventional wisdom, the war has made Tehran realize that its control of the strait constitutes powerful leverage. In this story line, the strait turned out to be Iran’s real nuclear weapon, its potent deterrent. Because Tehran could use this chokepoint to threaten global shipping, it was able to resist pressure from the world’s most powerful air force, reject Washington’