That has nothing to do with people erroneously blaming the "decay of society" or the "loss of traditional values" on things like rap music or videogames.
We can talk about how the internet has made things like porn ubiquitous, and how certain games are intensely addicting. But that is a wholly separate discussion.
If you had a loved one disappear in world of Warcraft or a porn spiral you will start to question whether those are normal things that should remain so openly available without limits.