Design is not solely visual. Those who believe it is, make an unconscious decision to confine themselves solely to craft. This limits these individuals from growing and taking on more complex and broad challenges.
No more true words have been spoken about what a designer really is in the advertising business. Production artists exist to be craftsman. People who know and understand the tools (software) like the back of their hand. Designers on the other hand must learn to be more than someone who can simply draw pretty pictures, they must learn to be communicators! Ideasonideas.com has a great article titled Designers must write. It’s a great read for the novice or pro designer.