It doesn’t make sense to actually what a war in the classical sense, to change the government. But to knock out their nuclear sites and other strategic elements does make sense.
Usually, a war is fought until a there’s a treaty or a surrender. In the case of Iran it’s hard to picture either. But they do seem to actually be pretty behind Israel, and a good setback can put them in place.
Also, I don’t know the situation in Iran. It is quite likely that s regime change is easier than is appears.
That being said, I doubt this situation is meant to fully resolve before Moshiach.