That's just ridiculous. Nobody can predict the future, so trading uncertain war in the future for a certain war today is completely irrational. (And for the same reason, the war today is unlikely gonna be easier than the war tomorrow.)
Besides, Iran has avoided having nuclear weapon, because it causes too many civilian casualties, and that's against their beliefs. In this, they're more civilized than Americans (and Europeans), despite that this might be considered to be an irrational view by barbarians like you.
I think you're just coping with the fact that this war was utterly pointless, destructive for almost everyone in the world, and a poor attempt to increase power by a small group of people.