That's just not true anymore. The US can't base aircraft close enough to Iran to start any serious bombardment without being under constant missile and drone attack themselves. Every base we would use could come under constant debilitating missile and drone attack. Even the carriers can't reach into central Iran without getting too close. Sure, the US has standoff weapons, but not nearly enough to degrade Iran, not faster than they can rebuild and make more missiles. We would run out of missiles faster than they would. And Irani air defenses are there; they aren't top of the line, but they could hit some of our drones and slower moving cruise missiles.
The bottom line is that Israel has no real way to retaliate against Iran directly, in Iran, outside of spy stuff like assassinations. To try to do any damage against Iran (not just proxies), they'd need the US, and we can't even do it right now. It would take almost a ww2 level of industrial mobilization to do, which we wont, and guess what? Iran is getting resupplied by Russia via the Caspian sea as well. No dice, they can't do it.