So the blood gushing, the splatter, the hitting-the-opponent-in-unique-ways-to-exploit-critical-points, all of these aspects add substance to a made-up world by adding real life details.
Also, Geralt is not a teddy bear, and seeing him do these things adds another dimension for you to understand the character.
Also, you do in fact invalidate someone's creative expression when you censor it any shape of form. You're essentially saying that what they did was unnecessary, or something we can do without. I am saying that all things, as we witness in the game, are added for the purpose of defining the world and the characters.
Since this is a commercial product, you can get away with asking for censorship, but the truth is that you're maiming the art and storytelling, and let's not pretend otherwise.
But whatever, as long as the game does not suffer because of censorship DURING THE DEVELOPMENT process, I couldn't care less about what anyone else did.