I don't dispute the cultural aspect, in fact that's a center point of my post. But Germany does have (to the best of my knowledge) a special rating board that even used to enforce censorship in games. E.g. games sold in Germany had to have blood removed.

Again, the cultural aspect is core to the entire thing, but nevertheless the overarching theme is that both countries apply a sort of self censorship.

America has ratings and similar censorship for games too. They also have strong cultural/economic taboos that work on top of it. They censor different things and different topics tho.

Every country has something that rates or censors entertainment for popular consumption. Some are overbearing or carry criminal offenses (Iran, Russia) and some are more off economic (store wont sell your game).