@Isabelle: If it we were discussing any other category types, I would absolutely agree with you, and I have recommended exactly this to other people.
However, I have a slight disagreement when it comes to Cemeteries. There are quite a number of cemeteries in many locations in the U.S. that are very small, and have only a few interments. For example in a number of U.S. states it was common in the 1800s to have "family" cemeteries that were on a portion of farmland set aside.
The Help page on Categories say "If a category could only contain a few people do not create it." (Stress in the help page itself.) How many is "a few people"? This is left open for interpretation. However, this guideline is antithetical to the goals of the Cemeterist project which is to categorize people into the cemeteries that they are located in. Cemeteries have now been defined as an extension of a One Location Study. Grouping those who are buried in the same cemetery, no matter how small, serves a genealogical purpose because it can help to illuminate who might be family to each other.
By arbitrarily creating a minimum number of people who can be in such a cemetery category, it defeats these purposes. But, I would also strongly argue that a cemetery category only, deserves such an exception to this guideline.
But the Cemeterist project and leadership needs to weigh in on this.