Fifty-six percent of Iran’s oil exports are to
Asia and 29 percent to Europe. Japan and the
People’s Republic of China (PRC) together
buy over one-third of Iran’s oil exports. The
U.S. buys no oil from Iran (other than
specially licensed swaps for Caspian oil).
They have been cut off for a long, long time already.
Of course the international oil flows could be rerouted to the south, then WE could threaten to close the Strait.
Closing the Straits of Hormutz is easy. Keeping them open is a naval challenge.