Sure when Iran is being bombed, that is not a safe distance when it comes to receiving fire. But there are also US, Israeli, Kuwaitis, mariners being hit by Iranian missiles. The proportions are not the same, but this isn't a situation of only one side landing blows. Iran is also landing blows and putting up a fight.

But the point is that the missiles are being shot from a distance. There is no invasion. When Iran hit Dimona or Kuwait, it wasn't sending troops there, it was firing off long range drones and missiles. I never claimed the war has zero casualties, but I very much doubt the number of casualties will be even within an order of magnitude of a full scale ground invasion. It will be in the thousands, not hundreds of thousands.