Violence simulations are easier to /fake/ than social simulations because few of us have routine experience with violence in our daily lives. We have little to compare the simulation against, so even though it's clunky, the violence seems plausible enough.

But since we have social interactions every day, we have sophisticated intuitive expectations about what's a reasonable reaction in a given situation. So social simulations are judged very harshly, because they have a lot more to live up to.