Imagine that Iran already had 10 nuclear bombs and the US bombed the production sites with B2s. What would Iran do? They can't drop a nuke on the US, and even if they could, that would just ensure their destruction.

Of course, one could argue that Iran is not rational and that it would nuke NYC even if it meant being destroyed as a country. But if we're assuming that they are irrational, then that's all the more reason to get rid of their weapons, even if it meant taking casualties.

And note that the same calculation applies with Iran vs. Israel. If Israel attacks Iran conventionally, Iran cannot escalate to nuclear without also getting destroyed (since Israel has a larger arsenal).

Moreover, Putin's invasion of Ukraine, actually demonstrates the uselessness of nuclear weapons. Yes, NATO and the US were initially deterred because of fears of Russian escalation, but we've continued to cross "red-lines" in arming Ukraine without escalation (tanks, F16, missile attacks on Russian soil, etc.). I'm pretty confident that Europe at least will continue to support Ukraine with ever more powerful weapons without fear of Russia's nuclear threats.

The incentives for having a nuclear program have not changed. Ukraine did not have nukes. Crimea, as a part of Ukraine. Syria. Iraq. Afghanistan. Vietnam. Libya. None of these countries had nukes. They paid for it.

What happened today isn't only not a "massive" change to the status quo, as you seem to think it is. Its so much less significant than what happened to the rest of those countries I just listed. Yet, you used the word "massive". Why? I have no idea.

Iran did not learn any new lessons yesterday. Nothing they didn't already know. The US does not want them to have nukes. We've done everything short of boots on the ground to stop them from having them. They should still want them. They're correct, in the defense of their territorial sovereignty, to want them. But, we'll keep stopping them. That's how it was in the 2000s, the 2010s, its how it is the 2020s, and it's how it will be in the 2030s and 2040s. They keep trying, we keep stopping them. The incentives haven't changed. Nothing has changed. Yet you doomers keep thinking this is the end of the world or its WW3. It isn't.

If anything has changed: Iran just learned that something which took them a decade of development, cost hundreds of lives, and billions of dollars, was stopped by a couple planes from a country half a world away at basically no cost to us, without barely a thought or care. Fox News was tracking these B2s on ADSB a day before they hit Iran; it didn't matter. That's how ahead the US is. The asymmetry here should scare the shit out of them, and the world; that they will never have a conventional nuclear program because they're so unbelievably outmatched and outgunned that if our President has one bad nights sleep he could just wipe out half their country, half of any country, with no congressional authorization, no checks, no balances, just launch a plane and they're dead. Maybe this pushes them to non-conventional means of obtaining nukes; but it shouldn't significantly change their desire for wanting one in the first place. They've always wanted nukes.