Absolutely right....moreso, there are only a half-dozen structures on the planet that are nuclear weapon proof....and Iran doesn't have one.
We still have the "dial-a-yield" Pershing II penetrator warhead that is perfect for busting bunkers. We just need to update the warhead and screw it on to a delivery system.
Man...I miss those Pershing IIs...it was said that the missile crews could drop the warhead into the Soviet PM's afternoon Tea through a window if the ballon ever went up.
I read once that there are nukes that are so accurate that you could,from 5000 miles away,aim one at the pitcher's mound at Yankee Stadium and it would hit somewhere within the stadium.
Mistakes can be made. During the cold war a Norwegian rocket launch (nothing military it was an atmospheric research rocket) made the Soviets think they were under attack. The channels of communication in Russia did not get the message to the military about the Norwegian launch. The Norwegians had informed the Soviets of their planned launch. It is this precise scenario that made the Pershing dangerous to stability. The Pershing thus was a bad defensive weapon but an excellent first strike weapon.