Moreover, the original point of Sturgeon was not a simple dismissal of "90% of everything" but his dismissal of any informativeness in somebody's similar claim

Moreover, the original point of Sturgeon was not a simple dismissal of "90% of everything" but his dismissal of any informativeness in somebody's similar claim for anything specific (he wrote about the art forms): "I repeat Sturgeon's Revelation, which was wrung out of me after twenty years of wearying defense of science fiction against attacks of people who used the worst examples of the field for ammunition, and whose conclusion was that ninety percent of SF is crud. Using the same standards that categorize 90% of science fiction as trash, crud, or crap, it can be argued that 90% of film, literature, consumer goods, etc. is crap. In other words, the claim (or fact) that 90% of science fiction is crap is ultimately uninformative, because science fiction conforms to the same trends of quality as all other art forms."