Plato's explanation that people do not know what is good for them

You read Plato's explanation that people do not know what is good for them when it comes to entertainment (dramas were what his society had available) and that the state (his word for government) should limit what people view. Aristotle, on the other hand, saw some value in certain dramas because of the cathartic effect. How do their views apply to mature-rated video games that contain violence? Is there any benefit to these games? Is there a detriment?