They really, truly, have not.

We did it because Israel was going to anyway.

We didn't do it for regime change, but then we did, oh wait we want to negotiate, but Israel keeps killing the new people in charge.

We did it to keep Iran from getting nukes, oh wait, there's no clear plan to get the material out and they've never said they're going to go get it.

We now are saying we'll negotiate for the exact same restrictions the JCPOA had, which we could have done without the war in the first place.

We totally don't need the strait opened up, we're super independent, but also really want them to open the strait.

Other countries should open the strait, not the US or Israel that started the war without the buy-in of other countries.

And finally, this is an illegal war for the US. Let's not play word games with the War Powers Act - this is a full-scale war, against a "worthy adversary" that 100% will not end in 60 days and one in which we don't control the terms of its end. Iran posed no imminent threat to the United States. Other than the most crazed warmongers like Lindsey Graham, it seems to me that the members of Congress who have been briefed in classified settings are in bipartisan agreement that this was a Bad Idea and that further involvement is a Worse Idea.

This is a colossal strategic screw-up, to use the most polite understated terms possible.