Russia and Ukraine is like this because they lack F-35s. This is what an air parity war looks like. Air parity wars are qualitatively different phenomena, and should not be conceptually clustered alongside air superiority wars during analysis.
Iran: Strategic outcomes are irrelevant to the question of unit economics in airpower. The amount of JDAMs they've dropped and the amount of money they've saved by using JDAMs instead of ballistic missiles is actually insane. Israel, for example, used over 20 Sparrow ballistic missiles to assassinate Khamenei, but they did this for an explicit tactical purpose and generally prefer to use reusable aircraft (as does any modern airforce who are fighting an air superiority war). If you would advocate for using ballistic missiles instead of JDAMs, why would this cause a different outcome, and why would this cost less money than using JDAMs? Regarding Shahed one-way attack drones, they aren't much cheaper than JDAMs and they're significantly less effective. They also do not provide a platform for forward telemetry like F-35s and ISR drones do.