Sorry I should have been more nuanced. Bombing can win conflicts but one thing is does not do is regime change.
I'd argue the occupation was necessary: The political system that led to militarism was still intact and there were still factions against surrender until the very end. It was regime change per se but a regime transformation and I don't think it would have been possible without an occupation.
I think that's fair. The leadership remained in power. However I would argue that in the case of Iran, Trump doesn't care if leaders remain in power, as long as they do what he wants. Specifically on uranium enrichment. I think he wanted to follow the Venezuela example, but this is not that.
I'd argue the occupation was necessary: The political system that led to militarism was still intact and there were still factions against surrender until the very end. It was regime change per se but a regime transformation and I don't think it would have been possible without an occupation.