it absolutely is by de facto censorship. It is entirely legal content and your supposition that problematic fantasy causes problematic real life harm is not only disgusting but an offense to all those who've had to suffer.
https://www.google.com/amp/s/thehill.com/opinion/technology/4424581-is-pornography-really-warping-our-brains-or-is-it-a-moral-panic/amp/