Plot armor. The main character of a story needs to remain in the story, alive and well. Otherwise, the story isn’t… well, a story. Not about the original character, anyway. Point is, plot armor is a device found in fiction, and not real life. I’d say ‘unfortunately’, but we’re trying to work with reality here, not complaining about what isn’t. So no plot armor for us, no point in complaining about it, might as well face the music.