A television program that includes nudity and ‘simulated’ sexual activity still uses actual people. The violence in such programming is almost always FAKE with zero physical harm (Islamists are the ones making snuff videos).
If the sex is just ‘pretend’ would you let your daughter appear in such works? Your wife? It’s not ‘real’ is it?
They don’t use prop mouths, sometimes they use a body double but they almost never ever use rubber boobs and butts in such scenes, it’s real human flesh.
It’s a false premise and the author does not make the case of moral equivalence very well.
Artists often work with real models. Those paintings may have been “just paint”, but were made with the assistance of people acting quite closely to the postures & attire depicted.