If it stops now, that would be a "win", evidently.

Not really. Again, the goal (for Israel) is for Israel to continue to exist going forward. So the fact that Israel is certain to exist next year even if Israel were to withdraw every soldier immediately today doesn't address the fundamental question - does continuing the fight, or leaving, improve Israel's overall security situation? Right now, the Israeli government believes that continuing the fight improves their overall security position. Others disagree.

I suspect that the continued Israeli bombing is creating new Hamas members every day. Unless they (Israel) plan to commit to a genocide, they really should stop.

There will always be new Hamas members, because unlike many other rebellions and domestic conflicts (like Northern Ireland), Hamas and other terrorist groups within Israel are part of a proxy war supported by other regional powers. Iran and Syria (but I repeat myself) will make sure that whether its the PLO or Hamas or the Popular Front for the Liberation of Palestine, that there is always an armed organization dedicated to the destruction of Israel.

They don't plan to commit to a genocide, but that doesn't mean they should stop. If things would be worse for them by leaving now, rather than staying to continue to degrade Hamas, then they should stay. That's an insanely complicated calculus, involving considerations not just of the damage they inflict on Hamas and its leadership, but all sorts of international and domestic factors. But it's not "genocide or leave."

As for the benefit of international agreements, again those are only in abeyance. They'll be in more or less the same spot if Israel pulls out now or in a few weeks from now. It's not especially likely that they'd get taken off the table for good even if the war continues for quite some time.