I watched Apocalypto for a school paper at age 15 (from a list of options given to me), and honestly I think some softcore porn would have been better. Some rated R stuff is fine for a kid to watch, Apocalypto definitely wasn't.

Also that same year I researched and did presentations on Chinese history (was a prehistorical to maybe a couple hundred years ago timeline) and at least in my research I covered things like the foot tying thing (to make feet smaller) and that didn't prepare me for the scene in Marco Polo (I think on Netflix) where that happened (and I didn't finish the episode or continue the series because it's just too fucked up).

Porn can be fucked up, some porn is definitely NSFL, but there are a lot of things that are so much worse than the average porn site.

I wish they actually tried to "protect the children" but the politicians are very clearly not.