Why?
Are the money bags behind Hamas demanding results?
They do better with failure.
With failure comes international money, international sympathy, international alignment against that big, bad Israel.
With success (as Yasser Arafat knew) comes the need to rule, to take care of the infrastructure, the schools, the sick, the elderly, the poor.
What military commander in his right mand wants that when perpetual war is available……for free?