Even a best-case combination of all available workarounds—rerouting pipelines, sanctions relief, and the fastest-ever strategic reserve release—would only mitigate 7 million of the 20 million barrels per day lost from a Hormuz closure. This leaves a practically unsolvable 13 million barrel per day shortfall.

By attacking just a few ships, Iran creates enough perceived risk to make insurance carriers unwilling to cover vessels transiting the Strait of Hormuz. This effectively disrupts 20% of the world's oil supply without needing a large-scale military blockade, a key tactic in asymmetric economic warfare.

The 20 million barrels of oil flowing daily through the Strait of Hormuz represent 20% of global supply. A blockade constitutes a disruption four times larger than the Iranian Revolution or Yom Kippur War embargoes, with no simple replacement.

The US has long used the threat of military force to keep the Strait of Hormuz open. By failing to act despite a large naval presence, it has revealed this deterrent is hollow. This hands Iran a proven economic weapon and erodes the credibility of US power projection globally.

Iran doesn't need a naval blockade to close the Strait of Hormuz. The mere threat of drone and missile attacks is enough to deter shippers and insurers, creating a "de facto closure." This asymmetrical strategy highlights how psychological warfare can be as effective as direct military action in disrupting global trade.

Iran has begun mining the Strait of Hormuz, a significant military escalation. Historical precedent from the 1991 Iraq conflict suggests it could take the U.S. military two months to clear the mines, establishing a potential timeline for the severe supply disruption and justifying oil's surge to $100 per barrel.

A militarily weaker nation can effectively counter a superpower by creating targeted fear and risk in a vital economic channel, like a shipping strait. By making insurance prohibitively expensive and transit dangerous, they can achieve strategic goals without needing to win a conventional military engagement.

Iran employs inexpensive weapons against shipping in the Strait of Hormuz. This asymmetric strategy avoids direct military confrontation while making the risk too high for insured commercial vessels, effectively closing the strait without a formal blockade.

Iran isn't blockading everyone, but specifically targeting the U.S. and its allies. This politically savvy move forces the U.S. to seek help from allies who may not see it as their problem, thereby exposing fractures in Western alliances.