No idea whether that estimate is accurate but 3 years doesn't sound long for an existential risk. If a large astroid hits earth in 3 years, I better do something now. Should probably have invaded 10 years ago.
The obvious solution is to get Israel to give up nukes in exchange for Iran stopping its nuclear program. I think that would everyone happy except the Israelis who want to murder people without repercussion.
It's crazy to me that this is peoples take away. Iran, Hezbollah, Hamas have the explicitly stated goal to annihilate Israel and its people. But Israel is the genozidal one. They're attacking military targets in Iran. Iran is bombing urban centers. I'm sure the IDF would very much prefer to only attack military targets in Gaza as well. Unfortunately, the Hamas decided to hide them under houses.