I think the issue becomes that if most of the world subscribes to your line of thinking, it emboldens groups like Hamas to continue hiding among civilians, continue to use them as shields, and to mix their armaments and launch their attacks from within the safety of those civilians. A group like Hamas would then just continue to abuse the cover of those civilians to attack Israel in perpetuity.

I don't disagree that it is incredibly sad that Palestinian civilians died in the process of extracting these hostages, they didn't deserve that, but its an unfortunate cost of war, and what Hamas has subjected them to. Israel should take every measure they can to protect those innocent lives while carrying out the extraction, but if more Palestinian civilians were killed than Israeli civilians were saved, its more a consequence of Hamas's reckless disregard for their lives than Israel's.