So, using your calculations, Iran must already have over 100,000 ballistic missiles after over 2 decades of heavily investing in missile production. Is that it?
The US claims that F-16 has been designed to withstand 8,000 hours of flight time during its operational lifetime. That's how many sorties? I don't know, help me out here; but I think if a typical sortie is taken to be 2 hours, that's like 4,000 sorties. Correct me if I'm wrong.
I couldn't find similar numbers for Su-30, but assuming a similar life span and assuming previous numbers are correct, and assuming we have purchased 50 Sukhoi-30 jet fighters, we can get 200,000 sorties out of them, each time carrying 8,000 kilograms of ammunition. Su-30 can carry 8 KAB-50L precision guided bombs, each having a warhead of 450 kilograms. Most Iranian missiles have been designed to carry 650 kilogram warheads. So, at each sortie, Su-30 can fire the equivalent warhead weight of 5.5 Iranian missiles.
So, using your logic, 50 Sukhoi-30 fighter jets are equal to 5.5*200,000 = 1,100,000 missiles. Does Iran have 1 million missiles? And we are talking about 50 jet fighters only. We can order 100 jet fighters. Then you'll have to prove that Iran has 2 million missiles. Your initial statement was about 300 fighter jets. So, feel free to scale up the numbers. It seems that Iran needs over 5 million ballistic missiles to compensate the firepower of such an air force and intelligence reports believe Iran has about 5 thousand missiles, although they could be wrong. But it is kind of difficult to believe that any country in the world can have more than 10,000 surface-to-surface missiles.
Plus, there are other advantages to having a powerful air force as well. I mean you can increase the range of your cruise missiles by launching them from an airborne platform obviously. And as you mentioned, you can intercept cruise missiles, UAVs and your enemy's airborne assets, etc.