I think they probably like having an GDP 25x larger than North Korea's. Gets a lot harder to export your products around the world when you're squared off against the US.

How does that follow?

We don’t need to occupy Iran to absolutely decimate their economic output.

What else are you going to do? Iran has been sanctioned by the US for decades.

Can you really sell "we'll be bombing civilians for years"?

They still trade oil with China, that is as much as the rest of the world they need. Of course, getting trade overland is a bit more difficult than by boat which is mostly cut off during a war.