Louis IV of France would make a minor change in every play Moliere wrote under his patronage and add himself as an author.
Jobs probably does at least some product development. However, having a single "auteur director" type heightens the image of Apple products as true masterworks, so Apple spends a lot of time focusing on Jobs' larger-than-life genius image.
Right, that's why I said he's mostly a CEO in title. Inventing new technology isn't typically part of the job description of a CEO at a major corporation.