That’s a bit different since it was a young, unregulated industry trying to avoid the government taking an interest in their hustle. The artists were not self-censoring out of fear of being deemed racist/sexist/insensitive/whatever, it was the studios saying you couldn’t have films be too violent/sexual/crass because then the government will come in and start telling them how they can run their business. Basically the same story for the Comics Code Authority. Today’s discussions about self-censorship are quite different, as they are linked more to things like representation and whether the content of the work is representative of who the creator is as a person. It is a fight about who has the right to tell what kind of stories and whether the art can actually be separated from the artist.