All this Iran's over reliance on AD systems is nothing more then false bravado.
That's true. It's actually true for most countries including Pakistan & India. People look at Israel's AD and imagine if their country can do the same, without realizing that Israel has a very tiny airspace and it has a very dense and extremely expensive air defense systems. Still its not impregnable.
The mullahs dident built the AF as they felt threatened by the fact that most of the AF was western trained, same with the army n the navy....they instead built up the irgc, who r better equipped n funded but related poorly trained.
The mullahs r realizing this but now its too late in the day.
Iran couldn't build its airforce. It could be due to Mullah's decisions initially but Iran did a very wise move by investing in its Ballistic missiles & drone program. These are the assets which are in mobile launchers and everywhere in Iran and under tunnels and caves. They are far easier to conceal and can be readied to attack quickly. The airbases on other hand are very difficult to conceal, as they are open and requires long runways.
BMs / CMs are more effective against Israel than combat jets as far as attack is concerned. There was never a chance that Iranian airforce fighter jets (even if they had exactly same inventory as PAF) to attack Israel. The F-35s / F-15s / Vipers along with Israeli AD would have downed most iranian jets in any confrontation. Today Iran can attack Israel with ZERO causality of its own. Iran specifically invested in those arsenal which can be safe-guarded / concealed and can also be used against its enemy (Israel) effectively. In that regard it makes sense. There could also be concerned that if Iran spend billions on fighter jets, those can still be destroyed on the ground by surprise large scale BM/CM attack.
Plus building a modern airforce requires billions of dollars and countries which can offer it. I think Iran got the supplier country (Russia) only recently because Russia is already under sanctions so it does not matter now for Russia.
I think focusing more on BMs / CMs than its airforce was also due to the large distance between Israel & Iran. If Iran would have been in comfortable range of Israeli airforce then it was necessary for Iran to also focus on its own airforce. Iran realized its not the case and it needed weapons to reach Israel, so it put its entire focus on Missiles.
Anyways, airforce still is very important despite the large distance from hostile country. It provides most credible defense against enemy combat jets. There is no doubt in it.
Kindly note my all of above talk is focused on Iran Vs Israel. If you put US in the scenario then everything changes. Imagine US B-2 bomber or F-35s from carriers coming your way. Then only thing which can provide resistance for sometime is your own Air force. However, I am not very optimistic about Iranian air force supposedly units (Sukhois, JF-17s, J-10Cs --- can't imagine any western aircrafts for Iran) against 5th gen stealth fighters.