Why is it so difficult to open the Strait of Hormuz?

Why is it so difficult to open the Strait of Hormuz?

@madsenandersc @lindarosesmit Not to mention that Iran will be making good progress at convincing the "non-aligned" nations of the world of the evil nature of the US and Israeli regimes (not that many will need much convincing).
What more proof will they need other than the last six weeks of unprovoked war followed by Trump warning in advance on Truth Social that he is going to instruct US forces to bomb civilian targets in Iran.