There is probably a very simple answer to this that I missed in early news reports.
It's so awful watching News Feeds that essentially seem to say that Gazans are having to move around in a cat and mouse game with the IDF to avoid bombs but have nowhere left to go.
I am very aware that war has casualties and other countries are at war. I am not necessarily saying that IDF should stop fighting.
But this war is different in that all civilians seem to be trapped. Normally war creates refugees. Ukrainians, Afghans, Syrians - they were able to get out. Not all, I know, but movement was an option and it kept civilian casualties down. Why can't Gazans leave Gaza?