Return of the Living Dead 3 (1993)

What is it (given all the cinematic evidence to the contrary) that makes some well-meaning people think their zombie loved ones can be cured? I was watching "Return of the Living Dead 3" and the zombies and guts were fantastic but the hero gave me the shits. "Oh, baby! You're eating everyone's brains but we can fix you!" It's morons like this that give zombie movies a bad name.