Could that work? It didn’t end well in Vietnam, which is about a fifth of the land area, and, in 1970, half the current population of Iran.
Also, they’ll pack a bigger punch, but I think the USA has way fewer bombers now.
We can't carpet bomb to regime change. But we can probably depopulate critical areas around the coasts while ships transit. It's stupidly expensive, both in materiel and collateral cost. But it's feasible. Whether we have the bomb-production is a separate question to which I don't have the answer.
(looks at map) the city of Bandar Abbas, population ~500k? It's already being hit as it contains the Iranian Navy HQ, but actually depopulating it is a much bigger project.
But the Russians have been doing it. Iran may have targeted an Israeli power plant. The precedent, unfortunately, is set.
The thing is that while Iran's water infrastructure is vulnerable, the Gulf states are much more reliant on desalination ... and hitting them hard there would be a total disaster ... which Iran is capable of doing, but has so far refrained.
I personally think there is a wide barrier between electrical and water infrastructure. But given water infra has allegedly been hit already, it doesn’t feel like it’s off the table for both sides the way it once was.