Madonna, while one of the most involved, also leaned heavily on collaborators at various points. You also have Mariah - who is the sole lyric and melodic credit on most songs aside from samples or guest features - who also had periods during which she enjoyed collaborating as a team to try out new things. The Memoirs era is a good example - she allowed The Dream much more creative control when they were in the studio together. Now, as I said, I would have a hard time stanning someone who truly just goes in the studio to record vocals over a completed track, but if the music is great then I guess it doesn't matter? Anti is one of my favorite pop albums of the 2010s despite clearly being a writing camp project.