[EForEndeavour]

I see what you're getting at, but in your analogy, Leonardo da Vinci (the creative and intellectual driver of the overall work) maps to the black-box LLM behind an API, where the boilerplate web app wrapper maps to the Mona Lisa's constituent oil paints, and perhaps also the backing poplar panel and frame. In other words, wrapping an LLM is like updating the frame around the Mona Lisa.