Easy Street,
It's not an air only campaign.
The rebels are doing the fighting against the regime forces on the ground. Air is giving them the advantage so that they can can fight the regime troops on a more level playing field.
Plinking at a few tanks would do little if the rebels didn't follow it up with decisive land action. Just because they're not our soldiers doesn't mean they aren't land forces using their supporting forces (NATO air and maritime strike) to effect their regains of territory lost.
I don't think anyone in their right mind could say that air isn't making a difference in this foreign adventure we've embarked upon but neither is it the airman's utopia of an 'air only campaign'