Because they have to keep up appearances? Because they can’t pretend they aren’t manufacturing a genocide if they publicly deny children polio vaccines? If they didn’t want this to keep happening, they’d have put holds on strikes on vehicles, or they’d be opening up aid routes, or they’d not have bombed all the hospitals and water infrastructure that was keeping polio from catching hold in the first place.
Their actions only mesh with my “narrative”. If your narrative is that Israel isn’t trying to genocide Palestinians, you’re gonna need to show some evidence that they are actually changing their behavior, because their current behavior is driving a genocide. And sacrificially firing a couple of people when their actions are a little too blatant ain’t it.