You might be philosophically right but I assure you that I would have to hire a large group of professionals from all directions to build an house because I'm absolutely incapable of building one myself. The right people for the right job! Also it might be a little forced since the writer and the painter would surely had a mentor that teach them the art that then they developed in their own way and in many cases they overcome their teacher if they were good students. The creation was theirs but they might have "consulted" with their own mentor about the techniques and materials to use to materialize that creation after it came to their mind.