Granted, it's a different kind of technical, but it's still complicated. Musicians deal with lots of math, a complex symbol language, and physical dexterity. Artists deal with various mediums, from watercolor to oil paints, and have to learn about color theory, computer graphics, and many related arts. A sculpture must know about various kinds of materials and how to manipulate them. Architects and product designers must have engineering skills.
Photographers deal with f-stops and other hideous things.
For instance, I'm not a plant person. I like plants, and have nothing against them, but I just hate getting my hands dirty. It's an obsessive-complusive thing. Now I have an aunt who just loves gardening. In fact, a few years ago she went back to school and became a landscaper.