In a vacuum, yes. But we aren’t in a vacuum and Hamas needs something more than a shaky ceasefire to release all of the hostages. Israel isn’t agreeing to a ceasefire unless every hostage is released. At that point Hamas loses all leverage.
It’s also an incredibly partisan move by a mediator who says their main concern is getting aid into the area. You need cooperation for that and you don’t get cooperation by backing the demands of just one side.