Maybe they’re eyeing potential spoils of war? These military operations will need sources of financing.
But, realistically, they’re probably planing the formation of an exclusion zone to avoid Hezbollah installing missile launchers so close to Israel’s borders.
Hezbollah has been sending missiles to Israeli territory for almost a year. So they started this war, but Israel has been very lenient by not starting a full-scale war until now. The patience has run out. Like they used to say: fuck around and find out.