Perhaps the most startling thing about the whole situation is that the Trump Administration was apparently surprised by, and unprepared for, Iran's capability to inflict economic pain on the U.S. and its allies. This despite the fact that during a showdown in Trump's first term the regime in Tehran used the same tactics of threatening to block the Strait and of attacking oil infrastructure in neighboring Gulf states that are allied with the U.S.
Forecasts that oil will hit $100 barrel happen regularly now because of the war in the Middle East and the shuttering of the Strait of Hormuz through which 20% of the world's oil flows by ship. If 2022, after the start of the Ukraine war, is any indication, $100 brings $5 gas.