I've wondered that too but suspect it's a lot more complicated than the occasional air-drop of medical aid by Jordanian air-force to a couple of hospitals . Not least that the IDF would need to agree to it as their air space is closed. Don't think UNWRA has planes either
There was a plan to bring humanitarian aid to northern gaza by sea/helicopter from Cyprus that was agreed some time ago - don't know if that ever happened
The bottom line tho' is that none of this is accidental - it's a deliberate strategy to starve out Hamas/try to get turn the starving population against Hamas
Babies and children dying of starvation is just more 'collateral'