I could be wrong on this but I'm not sure there's any evidence that suggests he's a designer as opposed to someone with an eye for design, similarly, just like

I could be wrong on this but I'm not sure there's any evidence that suggests he's a designer as opposed to someone with an eye for design, similarly, just like how he didn't build or code the original Macintosh but he knew how he wanted it to work. You wouldn't call him a programmer or engineer in that case either (although he did have some experience as a hardware technician).