Iran is a global pariah and a massive cause of death and destruction. They are also responsible for sending much of the poison that fills our streets with drug induced zombies. They provided weapons and training to our enemies. They hold the entire region hostage.
Bomb the living shit out of them. This bandaid needed to be ripped off and dealt with. No Iranian Vessel, flagged or not should be allowed safe quarter. Strangle their economy, attrite their capacity to damage others.
And then what?
The US has never had any trouble in the past or today in achieving that. But what comes next? You're showing your military thinking/training here but what must come next is the non-military thinking/training. And that is, 'how does the US (and the West?) prevent the vacuum that comes out of what you've described above being filled by another ISIS, by a larger, more dangerous version of the Syrian Civil War or by another despot, even if its a despot supported by the US.
An Iranian Civil War will crush the economies of the Gulf States and will more likely pull one or more of them in a Civil War as well. Can the world economy deal with that outcome? An Iranian Civil War will result in millions and millions refugees being absorbed by their neighbouring countries and beyond, Europe, by proximity. It will be another case of us in here Canada being able to smugly say, 'Thank God for the Atlantic Ocean, the Arctic and America', otherwise we'd have 1-2million on our streets.
Can India/Pakistan/The Philippines deal with the loss of employment of tens of thousands of young men if they can no longer go to the Gulf for work? Can their economies absorb the loss of remittance money flowing back into them that support hundred of thousands of family members? Can they themselves deal with tens of thousands of newly unemployed men roaming their streets and countryside searching for work?
What happens if the world's fertilizer output coming from the Gulf Region falls by 20% or 35% or even higher? Does that lead to less food being grown around the world? Does famine appear in Africa or somewhere in SE Asia? Does that lead to a new Civil War occurring in those areas? Does it start 2 Civil Wars, how about 5? How many new refugees will be coming from these areas? How many will try their luck in a dingy crossing the Med for Italy, Greece or Spain?
What if the oil/gas supply in the entire region falls by 10% or 25% or even higher? What does that do the price of gas back in the US? $4/gallon? $6/gallon? Higher? How big of a recession do we see? How many homes/businesses/loss of employment happen? Does this 'force' China, India and maybe even the EU to turn back to Russian oil/gas in order to keep their lights on, their homes heated and the factories working? Does this result in Ukraine going under as Russia has the new found money to keep the war going. Does that mean Canada/NATO gets pulled even deeper into the eastern flank of the NATO border?
I have never had any doubt that the US could not achieve 'total victory' militarily in Iran. I am also of the belief that the regime of religious fanatics running the place should be wiped out completely, they should have been wiped out over 10yrs ago, 20yrs ago, 30yrs ago, but nothing happened. But if the amount of planning that went into the military side was something like 1million man/hours of effort, then the amount of time/planning dealing with the political side, the 'what if' side of things, should be at least triple the amount of effort.
There's an old saying, 'Its easy to destroy something but its much harder to rebuild it after', this rings true with that is currently going on now.