What ground occupation? The point is to destroy the nuke facilities, the way the Israelis did to Osirak in 40 minutes. Except we have more planes and Gulf Arab bases, and we can enlist their air forces in some of the blocking and tackling.
Osirak was a single facility, and a large one at that, completely above ground. Iran has their nuclear program scattered amongst God knows how many sites above ground and below. There is no way that you can guarantee that you will take them out with air strikes. But then after your days of air strikes then what do you expect Iran to do? Nothing? Or will they sink tankers, block the gulf, strike back at their neighbors and against us and Israel any way they can?
Anyone who thinks that this is a short term, few day military operation is crazy. Airstrikes only begin the process that will eventually require ground troops.