It is very hard to align this response magnitude with the narrative that the Iranian attack was 99% shot down and did nothing.
Rather, it’s wiser to believe nothing from the media.
This response does not say 99% shootdown. It says Israel got hurt.
Iran’s attack was 300 missiles launched directly from Iranian soil to Israel. This was the first time Iran directly attacked Israel. That mattered more for Israel’s response than how many were shot down or what targets they hit.