Fantasy "murder" is not the same. There is a detachment from reality when you are slaying monsters. Yes this game does offer some graphic scenes and normally, I dont give it much worry. Murder and sex are not the same in video games. That's like saying Minecraft has murder in it so, it might as well have sex too, which it does, very non graphic, they even make babies... Done with tact.
A game rated M is all about the graphics, all about showing everything and not hiding it.
An M rated game is not meant for 17 year old's and younger. All because of what it shows blood drugs violence nudity/sex etc and not hiding it like fade to black.