This is not true my friend, Iranians are very aware of anti-ballistic missile systems. That is why you see a great effort to increase both the quality and quantity of Iran's missiles to help defeat these systems. Iranians are proud of what they accomplished with their ballistic missile program, and that is for a good reason. When one understands what and where Iran started from, anyone should be impressed. There was a time when Iran was struggling to get even barbed wires during the Iran-Iraq war. Something like an accurate ballistic was a distant dream. But by sweat and blood Iran achieved it.
I am not sure if you read the recent article by Uzi Rubin but he wonderfully described the shift in the perception of missile power. The world is moving away from this notion of "missile cannot win wars" and in a good part, he used Iran as the example as to why this is happening. This accurate missile strike you see in this thread is one tiny example. Here is the link to his article if you're interested:
https://besacenter.org/perspectives-papers/israel-precision-guided-missiles/
Nowadays these ballistic missiles systems are capable of paralysing nations by pin point strikes on strategic sites. Iran has this capability and that is why you see the confidence that you do. However Iranian do not think for one second these systems are invincible.
If you have 25 minutes to spare, You can also listen to the Uzi Rubin below and his view on this Iranian methodology of warfare.
I am happy you have visited Iran and have a positive view. I can say that the vast majority of people that go to Iran are always amazed with how the reality of Iran is different to what you hear about in the media. Iranians are one of the most hospitable people on that planet. You're welcome to visit there anytime.