This seems like one of the first very clear indications that separating your country from the US can be beneficial. The first stone unturned - will we see more countries aligning with other powers?
Also Iran's leverage is in the reduced world volume. If they allow 110 Ships to go through but block the 20 american-aligned (vastly over stated US-bound ships are not anywhere near 20/day). Than the problem for the US is minimized because that would stablize oil prices a reduction of 2% of the world supply might be managable 20% is very hard to make up. Being seperated from the US does not = safety because Iran's leverage is the world shock that will effect the US last. The US is net exporter of Oil. They also import a ton of oil from other nations though due to the Jones act (temporarily on hold). Oil is a world market if cheap oil flows Iran's leverage is gone.