Comment by simianparrot

That's a really bad analogy, because even in digital art where you can pick your color from a color wheel on a monitor, understanding how primary colors combine to become different colors and hues is a _fundamentally_ important aspect of creating appealingly colored paintings, digital or physical. Color theory is about balance; some colors have more visual "weight" than others. Next to each other they take on entirely different appearances -- and can look hideous or beautiful.

This isn't me saying digital artists need to practice mixing physical pigment, but anecdotally, every single professional digital artist I know has studied physical paint -- some started there, while others ended up there despite starting out and being really good digitally. But once the latter group hit a plateau, they felt something was lacking, and going back to the fundamentals lifted them even higher.