A plan with quite long odds you could rightly say, but not as stupid as subduing them by invading them I suppose.
"Iranian Patriots, keep protesting – take over your institutions!!! ... help is on its way", said Trump. And then... nothing. They could have provided money, weapons, intelligence, support of all kinds but instead chose to let their potential allies be slaughtered.
Similarly, the US facilitated the dismantling of Rojava, the Kurdish polity in North-Eastern Syria. The Kurds had been led to believe that they'd be able to retain some form of semi-autonomy, but the US pulled the rug from them at the last possible moment. And then, er, wondered why their cousins in Iran weren't willing to rise up against the government there.
It's almost as if they spent the whole of January putting themselves into the worst possible position for achieving their war aims. What did they hope to achieve by sabotaging themselves in that way?
And per analysis I heard in French media from Iranian opposition understood the war as a war of destruction, not as a war of liberation. As they continued to be executed daily by the regime.
Meanwhile one of multiple explicit day 1 plans was a plan to negotiate with successor within the regime - recreate the Venezuela situation where you keep the regime, keep its tortures, but put head more willing to give up oil on its head.
"At 2:30 a.m. EST on 28 February, Donald Trump released an eight-minute video statement on Truth Social, saying that the purpose of the US strikes in Iran was effectively[vague] regime change."
There’s only one group of people dumber than US politicians and that’s the American people who support them.
Who will ever trust the US enough to negotiate in earnest?