Temporarily it is. At least that is my thinking. It seems that Israel is engaged in siege warfare. They have Gaza split into two and the north is completely cordoned. No fuel, food or water is reaching Hamas in the north. They are under bombardment and shelling 24/7, while IDF soldiers can rotate between the war zone and peace and quiet to eat and sleep.
Hamas terrorists with either die of kinetic force or dehydration/starvation. When they are dead the IDF can finish destroying tunnels at their leisure.
Funny, there have been statements from the IDF that this will be months long, perhaps as long as nine. Will get very uncomfortable in those tunnels over time degrading Hamas troops even without the suggesting gas them or send in alligators. And I suspect Israel will make them uncomfortable eventually. Water perhaps, not to drown them. Nausea. Rock music for sleep deprivation. There’s no rush.
That’s “if” the terrorists didn’t, already go south and if the tunnels don’t connect to the south, which the probably do.