do you expect a joint was with Israel to result in the USA taking responsibility for the bad along with the good?
we're adopting the Israel intervention playbook, not teaching them to moderate. All of our middle eastern ventures have followed the same path, blow shit up, fail, eventually lose will, leave, deal with consequences. that is why it's not worthwhile, it's bereft of Iranian context altogether. if my house has all of the pipes leaking it's "worthwhile" to fix it, but if i dont know plumbing it's not heroic for me to try and botch it. but with Iraq context we aren't unknowing of our own ineptitude, we know full well we will fail in a regime change, we know we'll try and spend a lot, then in 5-10 years a democrat will ride the wave of distaste for the war into office, and we'll fail anyways. OR we'll blow it up and not rebuild at all, not change regimes just exhaust the regime and set them back. which will cost trillions in bombs and interceptors and cause a refugee crisis we have to absorb. its a fail anyone can see coming, anyone left thinking this ends well in any way is coping hard. all roads lead to bad outcomes.
The fact that your prediction includes a time span of 5-10 years is, I think, optimistic.
Regime change would be great. No one rational disputes that's absolutely ideal.
But the bare minimum accomplishment is setting their nuclear weapons program back years. If you think it's reasonable to leave them within weeks or months of developing nuclear weapons, you are insane.