The difference is between art which is seen as "too adult" being said to ruin society (like movies/games), which generally aren't that bad, and content which is

The difference is between art which is seen as "too adult" being said to ruin society (like movies/games), which generally aren't that bad, and content which is specifically targeted at exploiting children's mental weaknesses for monetary gain. I don't think they're "ruining society", but it's definitely gross and something we should fight if at all possible