Can you imagine the amount of destruction to infrastructure in both Iran and the other Arab countries that have been caught up in this madness? How long does it take to clear a bombed electricity generating facility of rubble and then build a new on in its place? Years. We bitch and carry on if our electricity is knocked out by Mother Nature for a day or so. Imgine having to go through a MIddle Estern Summer and winter without air conditioning or heating. Don't forget that the Iranians are not tent-dwelling camel drivers. They are the descendants of one of the longest running urban societies in the World. They are smart, sophoisticated people, despite their religion. They aren't even Arabs. They just follow the same religion.
After WWII, the USA poured money into restoring Europe and Japan. One reason was so as not to repeat the errors of the Treaty of Versailles which battered Germany and lead to the rise of Hitler. The cause of the war with Japan was, would you beleive it, the USA trying to stiffle Japan's idea of an Asia run by Asians, not Europeans. Now, the USA is just about bankrupting itself waging an unwinnable war. There will be no money from that source to rebuild Arabia.