First it's "no outright porn" then "no naming of private parts" then "no blurring of line between good and evil".
You can imagine their conditions as an area, and your meaningful life as an area, and the Venn diagram of those two stops intersecting. You can't write "Crime and Punishment" without blurring line between good and evil. You can't write about any problems you are having. So now you are writing something banal, bland and unconvincing (as most of communist art is)