The "government should take care of everything" crowd decided that it - and not parents - should determine what video games could be sold to minors. Because violence is bad.
Of course they didn't seem to care about the violence in other aspects of life kids are exposed to.
Scalia noted that books often viewed as suitable for high school students are full of violent material. “Certainly the books we give children to read--or read to them when they are younger--contain no shortage of gore: Grimm's Fairy Tales, for example, are grim indeed. As her just deserts for trying to poison Snow White, the wicked queen is made to dance in red hot slippers 'till she fell dead on the floor, a sad example of envy and jealousy.'”Heavens. Maybe we should outlaw red-shoes, or childrens' stories as well.
The news story I saw on this earlier included references to "Call of Duty," the video game developed, in part, by the US Army.
In the end, it doesn't matter why they wanted to control video games; SCOTUS said no. It will be up to parents to control what their kids play, watch, read, etc. Just like it should be.