Producer or director, he's still involved in the movie's creation. Just because he doesn't have overt creative control doesn't mean everything that comes out of the movie is not connectable with him.
Violence in movies is not done for skillfully for art. Violence in movies is typically done:
a) Unrealistically and action packed. Often done this way for games. Explosions, people flying through windows from bb guns, etc.
b) Grotesque and shocking. Has never been done this way for a major game release to the degree movies accomplish it. A bit of the old ultraviolence, it's done to be shocking. You can call that "artistic" but again you have to be willing to apply the fact that they're just trying to be shocking to both. I've seen major movies where we get to see people limbs sawed off with blood flying around in splatters as it happens, gratuitous torture, etc. You can't say Saw is "artistic" but Manhunt is "senseless." The entire point of movies like Saw and Hostel is to be sensational, edgy, and to creep the viewer out. Same thing games like Manhunt go for. And games like Manhunt will still do it less graphically than the movies.
Can you honestly say that a movie featuring
is more artistic than what Manhunt offers?
Oh, I don't mean it's always the case, mostly violence is still just stupid violence. But sometimes brutal viiolence has actually "artistic" place in movie. I yet have to find game which has brutal violence not for those reasons you put up.
You never played FEAR! You've seen nothing until you've seen a torso flipping through the air STILL HOLDING AND FIRING A GUN in slow motion! Or even a body just vaporise into a red cloud as you shoot close range with a shotgun, also in slow mo. Which is especially neat because when it happens, it happens so often in doorways and halls, so you just run through that red cloud thinking "oh god, that's just creepy, I walked through a vaporized dead man."
None of it is any more brutal for the sake of being brutal than the fight scenes in Kill Bill.