I can't speak to the article as its paywalled, but professional artists absolutely need and utilize studio management services. I worked in the art world for years before entering the tech industry and it was common, at the professional level, to see teams of office workers working for major artists.
The usual trajectory is something like:
1. Get a studio assistant.
2. Get a couple more studio assistants.
3. Get a studio manager.
4. Get an accountant.
5. Get team of assistants.
6. Oops now we need HR.
The usual trajectory is something like:
1. Get a studio assistant. 2. Get a couple more studio assistants. 3. Get a studio manager. 4. Get an accountant. 5. Get team of assistants. 6. Oops now we need HR.