When is a release a “compilation”? I think it’s important in evaluating questions like this to read the Style docs, yes (thank you @mfmeulenbelt), but also to try to clarify what purpose the style guideline is trying to accomplish. How does it make the data better?
The docs quoted above hint at a continuum from “one take direct to disc” to “studio album recorded in 100 sessions over 50 weeks” to “greatest solid gold hits of the 1950s”, and the purpose of the “compilation” designator is to say that the Release is fairly far on one end of that continuum.
So I heartily agree with this sentiment: