Androids who cannot can't use contractions. This is basically the same problem as translators not translating metaphors, only worse.
Heroes who "demonstrate that killing (or sacrifice) isn't necessary" because they live in a world contrived to provide ways in which killing isn't needed--always have a third way turn up, never have concussions be lethal, etc. The one who did it right was Superboy in the Legion, who voted to acquit a member who killed because it's easy for him not to kill, being ultra-powerful, but the other members don't always have that luxury.
Heroes who "demonstrate that killing (or sacrifice) isn't necessary" because they live in a world contrived to provide ways in which killing isn't needed--always have a third way turn up, never have concussions be lethal, etc. The one who did it right was Superboy in the Legion, who voted to acquit a member who killed because it's easy for him not to kill, being ultra-powerful, but the other members don't always have that luxury.