“The goal is to destroy Hamas’ capability for war.”
If you take Gaza back to the stone age, its thugs will use stones and slings.
The evil leadership and attackers of Hamas have to be systematically identified and zapped by drones.
Being a Hamas thug has to be seen as a dead-end job with only downsides.
That wouldn't be sufficient. Ideally, they'll have new homes in the Sinai and it will be up to Egypt to reel them in. But Sisi is not going to want that. Egypt had problems with the Muslim Brotherhood.