One can think of Golden Age Comic Book Superheroes as Breen Office pre-approved but Golden Age Film Noir as Breen Office pre-disapproved.
During WWII, Hollywood was not taken over by Allied government censors , contrary to expectations.
Instead Hollywood (Breen Office) censorship methods simply took over the Allied governments.
The bright uplift that Joseph Breen always strived for within the small - virtual - world of major Hollywood films became something Allied governments tried to fairy dust over all of their nations' activities.
Allied war efforts certainly killed many neutral and occupied nation civilians - hundreds of thousands of them in total.
But you would never see the Allied propaganda efforts boast about these deaths in the way the Axis did about their complete destruction of civilian Lidice's entire population and houses.
But Allied newspapers and books remained surprisingly free to comment about everything but immediate military operations .
As a result , the front pages (& Hollywood 'war' movies/comic books) had huge but empty war stories , all about Breen Office uplift and how the fiercely determined Allies were united in seeking a quick end to all forms of discrimination.
But those newspapers' same back pages had plenty of tiny but fact-filled items on examples of Home Front profiteering, slackers and racists.
By 1943, this dissonance had led many left leaning film people to start turning out film noirs that hinted at this moral disconnect....