Looking at the strike range of Iran, North Korea and China, the focus on long range strike capacity may score propaganda points within the US but ignores the tactical value of said weapons. Iran's goal is more likely to stay US naval power in the Persian Gulf and perhaps as far as the Red Sea. A nuclear Iran can keep 7th Fleet carrier groups out of both bodies of water and shift the balance of power in their favour. Would they strike Israel? Who knows? There certainly isn't any economic advantage in doing so.
The same goes with China and North Korea. The US has to consider the implications of naval actions in the East Pacific and Indian Oceans. US aggression may result in the Incredible Vaporizing Aircraft Carrier. If you're either Asian power the ability to take out Seattle, Honolulu and San Diego makes you pretty safe from conventional war. Anyone ever hear of imperial overreach?
