They are already not doing that

Many of the houses are destroyed when they are identified as traps. Hamas brags about have trapped so many homes. Did you not see the recent video of the girl getting blown up by an IED? They tried to pin that one, like them all, on Israel but enough Gazans online pointed out that the reason there was a camera pointed at the incident was because it was another Hamas trap. All these similar deaths are pinned on Israel, this makes sense in Muslim media where culturally, dying in battle with the infidel is their highest honour, no matter who shoots. But it does not make sense in Western media where human life has more value.

Likewise with the hospitals. They continuously shoot rockets at Israel from hospitals. They show it in their own media. That, on top of using hospitals for sniper fire and for command centers and for tunnels. Just read channels like عزه الان (or any of dozens of others), they are not even shy to discuss it, it is not taboo in their culture.