It’s not that simple though; Israel wants to eliminate Hamas (and they have plenty of reason for that – if Mexico attacked the US like Hamas attacked Israel, there would simply put no longer be a Mexico).
It would be tone deaf to Israel to say “leave Gaza” without that mission accomplished. They claim they don’t even want the area, they just want Hamas gone.
Furthermore, Hamas is fighting with guerilla tactics. They’re intentionally trying to provoke war crimes. Israel doesn’t have to be so dang willing to fall for the trap. However, Hamas is making it exceptionally hard to fight a clean war from what I’ve read. Citizens in the Gaza strip are not just being abused by the IDF but by Hamas.
I wouldn’t be surprised if Biden has his own Intel to back that all up. If it were as obvious as people want it to be, I’m pretty sure we would’ve stopped sending aid by now.