I think some people are looking at this in binary terms. A win for them is a loss for us, and a win for us is a loss for them. There are multiple levels here, where no one fully wins or loses.
Hamas' goal is dead Jews. A win by them is dead Jews. Not "fully winning" means fewer dead Jews now, but more dead Jews in the future. That's why they bothered taking hostages in the first place.
Does anyone believe that other than BBC, Skynews, & Rabbi Jessica ?
What's so hard to believe? There is lots of evidence that many hostages were taken by civilians. One can assume they handed them over to Hamas once they came to Gaza, but it is not a given. PIJ also took hostages, it is not a given that they shared details with Hamas. And Hamas has been attacked by the IDF blowing up tunnels and infrastructure, it is more than plausible that some hostages and their "guards" have lost contact with Hamas leadership.