Steve doesn't do it all himself. Even much of the original Macintosh design is probably better attributed to Jeff Raskin, Woz, and Bill Atkinson. Steve is a good showman, and good showmen know to never introduce the stage-hands, but Steve has had plenty.
Now, you might argue that if Steve had zero taste, then he also would not have had the sense to demand design perfection. That may be true. But if you are a CEO of a company today and you are hoping to replicate Apple's success, you would be much better served by cutting your product line in 1/4 and demanding absolute perfection from the remaining products, than by going off to find a guru, take Caligraphy classes, and stare at van Gogh all day...