Piracy is the opposite of unethical, because information wants to be free. IP rights holders had their NAP violated - and society is better off for it.
The reason it's "against the wishes" of folks in a JAV video is because of the legal risk it opens them up to from the Japanese government - not because the actors/actresses "don't consent to viewers seeing their uncensored body".
Note that I am NOT talking about distribution of non consensual deepfakes. Obviously that's abhorrent.