I’m missing something here. Admittedly, I’m making the assumption that blowing up hospitals is a bad thing to do.
There’s two answers that are both legitimate.
The first is that we don’t have any sort of defensive weapons between Israel and Gaza. To intercept missiles/bombs/whatever
Stuff like the Phalanx and RIM-116 at sea; or C-RAM (technically it’s the “land based phalanx system”…. But there are some critical difference in radar and the munitions it uses.
The second answer is that the US navy hasn’t been ordered to. They haven’t been ordered to because their civilian leadership is 100% okay with Israel bombing the fuck out of Gaza. Yes, that includes Biden.
Politics. US is ally with Israel but notxwith Iran, US isn’t the world police but a country defending their interests which includes their allies.
I somehow hope, that this slow drone attack is also some political theatre like, we shoot some drones to protest our embassy bombing, but we won’t go further
US politicians are unfortunate hostages to their bigger sponsors / financiers. Most of the players on both sides of the US political spectrum have been funded by israeli or pro-israeli contributors. We call Israel an ally, and that’s a nice coat of shiny paint to hide the Stockholm syndrome.