Different goals. Carpet bombing to deny Iran access to its coast is maneouvre warfare. It’s tactical. Carpet bombing to force Kyiv to capitulate is strategic bombing. It has never worked.
You can't deny access to a coast that large with carpet bombing, especially in a mountainous terrain. It has never worked. You'd need tens to hundreds of thousands of boots on the ground to do that.
If you wanted to try it with bombs, it would take continual re-dropping of hundreds of thousands of bombs every few hours to cover (1600km * 8km) to keep people out, even assuming they have 0 shelter or cover.
You can't deny access to a coast that large with carpet bombing, especially in a mountainous terrain. It has never worked. You'd need tens to hundreds of thousands of boots on the ground to do that.
If you wanted to try it with bombs, it would take continual re-dropping of hundreds of thousands of bombs every few hours to cover (1600km * 8km) to keep people out, even assuming they have 0 shelter or cover.