Yeah, but they banned it as a bad way to deal with a water shortage problem. Israel banned it because they are pricks.
Many rural areas with Palestinians, including Palestinian citizens of Israel, aren't even covered by the Iron Dome system because they are registered as an empty area. They also don't get basic infrastructure that Israel would otherwise provide to any illegal settlement right away.
That would make Hamas even dumber as bombing Israel would mean a large number of unintercepted missiles will fall into areas where Palestinians live.
Hamas has banned the digging of wells since 2021. I don't see how they would permit the harvesting of rainwater, even if there weren't Israeli legal regulations in place (which seem to be on par with many other countries' laws). That plus their systematic dismantling of working water infrastructure for rocket parts has had it's effects.
save