Rofl.It was a saturation attack. Nonetheless, it was clearly visible in the videos that dozens of missiles were intercepted: I saw at least one exo-atmospheric kill.
Of all missiles, ballistic are the easiest to estimate where they are heading. They follow a ballistic arc, and the type Iran launched is easy to track in its boost phase.
Iran gave no such warning to airlines. A guy on a flight from Dubai posted a video of missiles flying eerily nearby their plane. It’s a testament to how advanced American-Israeli technology and training are that no airliners were harmed, despite hundreds of missiles in the air.
An airliner is a mobile, 3D target. To be hit with a missile that has no ranging or bearing guidance, only 2D coordinate guidance in the terminal phase, is one of supremely bad luck.