

the resources to handle the… counter-attack
A big part of that usually involves left of launch defeat, striking ballistic missile storage facilities, launchers, command and control, before the missiles launch, to reduce the amount of incoming fire air defence systems have to deal with. (The cliche about the best defence being offense applies here). It’s not the Gulf War anymore, left of launch defeat can be done to some degree. While modern cruise missiles have two way datalinks and can hit relocatable targets and/or act as loitering munitions, doing left of launch defeat just with cruise missiles would be incredibly difficult. If left of launch defeat requires overflying Iranian airspace, that requires large scale offensive counter air operations, which requires the large military build-up.





Strike what right now? Empty hangars and pavement? US military assets aren’t in place yet, Iran could cause a lot of damage with a pre emptive strike to US military bases, kill a lot of people potentially, but ultimately they wont be taking out the planes that would fly into Iran, because those planes are still in the United States currently. Or in the South China Sea onboard an aircraft carrier.
These kind of movements are impossible to hide, and news organisations always want a scoop, even if it’s only a few hours or days before the movements are evident.