I feel like much more people would feel obliged to play pacifist only instead of attacking in UTDR if the enemies had brutal death or hurt animations.
Like with Red Dead Redemption 2 I only play high honor and never commit any crimes outside of the story because I once shot a lawman and watched him try to flee in fear while blood splattered everywhere and then fall and squirm on the ground crying in pain bleeding out for a solid minute and I felt so bad I almost cried
UTDR needs something like that. I feel nothing when I see them just turn to dust or run away.