The American blockade has limited effectiveness because ships can just travel along the coast into Pakistani and then Indian coastal waters.
https://www.youtube.com/watch?v=W__UF5R0Dok
Blockades can work, but they take time, and often take a toll on civilian populaces.
https://www.youtube.com/watch?v=_HSLkn-P0fE
The ships and crews that Trump is blockading are not just Iranian ships and crews. Is the US going to steal or sink foreign ships? What if Pakistani or Chinese military vessels escort their ships? Will the US start a war with these countries to enforce the blockade? Ships’ crews can lock themselves in the bridge and engine rooms, which will stop boarders from controlling the ship, what will the US do then?
https://www.youtube.com/watch?v=8mHpmTN86-Q
China is preparing to invade or blockade Taiwan.
https://www.youtube.com/watch?v=AlXg204rMqI
Xi Purged His Top General—What It Means for Taiwan
https://www.youtube.com/watch?v=2vnZuTYFV_U
The Tanker War & Shadow Fleet – U.S. Ship Seizures, Ukrainian Attacks & Russia’s Gambit
https://www.youtube.com/watch?v=Ux3b00jo1iQ
The reasons for current military action against Venezuela given by Trump and his allies are various. And the list of reasons to justify war sound a lot like Putin before and after invading Ukraine and W Bush before and after invading Iraq. Reasons for action in Venezuela include: drugs, terrorism, the influence of Russia and Iran, stolen land, stolen oil, opening up Venezuelan oil to American companies, and Maduro being the illegitimate ruler of Venezuela.
https://www.youtube.com/watch?v=73ocuj4Adtw
Iran has several ways to close the Straits of Hormuz, and opening it back up will be deadly.
https://www.youtube.com/watch?v=VTly35T4fz0
“the way we think about how China would overrun Taiwan may well be wrong. Rather than an all-out invasion, it could attempt to capture the island without firing a single shot through “gray zone” tactics. Such tactics might combine maritime blockades and advanced cyberwarfare capable of cutting off Taiwan from the lines of seaborne trade and the digital access it needs to survive. And Beijing could do so in a way that might be just far enough below the threshold of conflict that would drive Washington and its allies to come to Taiwan’s aid.”
https://www.vox.com/world-politics/390895/china-taiwan-conflict