I'd say it's the exact opposite. Porn has never been as mainstream as it is now, movies and video games have never been as violent. I remember that in the mid 2000s, GTA and Call of Duty were literally demonized because of the depiction of violence.
Now onlyfans modells openly collaborate with mainstream musicians and Call of Duty has stayed just as violent while appealing directly and openly to children. I am on lemmy.world, if I sort my feed by "Hot" and include all instances, I count about 2 or 3 NSFW post per page on average. And I'm not talking some cosplays, I'm talking hardcore BDSM stuff.

This goes into the realm of conspiracy theories, but it certainly feels like advertisers have some sort of agreement to stay away from controversial topics, keep the viewers minds clean and neutral. So that when it becomes necessary or more important profitable, they're easier to sway one way or the other. Don't think, just enjoy and consume please, and don't forget to hate who we tell you to hate.