Israel was at the limit of the range of its jets capabilities when it attacked Iran but they still managed to degrade Iran's ability to launch missiles as we saw launches drop off each day.
Your logic is wrong. Less launches caused 10 fold more damage than early mass launches. Beersheeba, Eshkol, Soroka, Bazan, Weiznmann, Gav-Yam negev strikes came at mid to end of the war yet
(A) Were never responded by Israel ... target value for target value. These strikes were aimed at oil infra, hospitals, strategic research institutes, tech parks, power stations etc.
(B) As per Israelis themselves who are known to hide casualties or give censored numbers (official gag order on local targetted area coverage), just these late strikes resulted in roughly 3000 injuries.
(C) Less numbers of missiles fired from both sides align with momentum of talks for ceasefire. If we go by your theory, what was stopping Israel from going after oil infrastructure or terminals, nuclear domes, military or strategic HQs in end days of war ?
The lack of an air force, and IADS will cost Iran dearly as its missiles capability will be defanged very quickly for that reason.
Provide evidence for "Iran has no IADS" ?
In reality, Iran has a dense and layered IADS network of OTHs, Search n Track radars, passive sensors, HIMADS, SHORADS etc but like any other IADS on earth including the ones of superpowers, there is just no defence against hypersonic lofted ALBM with separating MaRVs (Golden Horizon) or even some SOWs. Israeli ABM/AD sheild itself despite being full datalinked with US Search/Track assets (ground, air, space) failed to shoot down a single hypersonic or skip glide missile in TP1,3,4 despite being fired (Fattah, Kheybar Shikan). Attack weaponry has left AD far behind. Khinzal, P-800 Oniks/Brahmos, Fattah, Kheybar Shekan, Golden Horizon, Rocks, Blue Sparrow have not been kintelically intercepted despite being fired in wars or conflicts. Even if we go by one sided Ukrainian claim of shooting 5-10 % Khinzals, there exists zero evidence of other types ever been shot down.