This works fine from 1980-2020ish when you're fighting limited intensity conflicts against countries you have uncontested air superiority over.
But with cheap drone technology and other innovations of the last decade it's never been easier to be a near-peer adversary. The incumbent powers of the world have vast expensive arsenals of weapons designed to fight the last war.
That being said, I know that the US Military internally has been very well informed of the realities of what a war against Iran would look like for decades. It's been well understood for a long time that decapitation strikes against Iran won't work because their military and paramilitary organizations are deliberately composed of highly autonomous units. You could have asked the janitor at the US Army War College in January 2025 how a war against Iran would go, and he would have told you it would be insanely costly, that Iran holds a indisputable advantage in a defensive conflict and that they have numerous strategic cards to play like blockading Hormuz, attacking the Gulf states, and drawing support from the US's larger geopolitical allies.
Ironically, the US had all of this intelligence within their institutions but ignored it. They ignored it precisely because the US is vulnerable to decapitation strikes.
Our current US administration is woefully incompetent.
Amazing and yet not at all surprising... entirely predictable given what lead up to it.
If someone wrote a story 10+ years ago about how a draft-dodging nepo baby reality TV actor who had never successfully ran any organization himself that wasn't a complete grift improbably became a world leader and he hired another TV personality with no leadership experience to run the US military based entirely off of loyalty and the fact that he physically looks the part of someone who might play the role of SecDef in a Tom Clancy movie adaptation, you wouldn't accept the plot if the outcome wasn't a complete trainwreck.