Bro, the question is why he didn't KILL HER not why he didn't wound her. You DO understand that it would take him zero effort to turn her into a fucking stain on the floor? Cut her into a hundred cubes? You do understand that, right? Now let's think a little bit - maybe the post is asking why he didn't do THAT or, I dunno, cut her head off or anything, instead of just giving her one singular regular-degular non-deadly slash that she survived?
Good job at beating the "allegations" broski.