A designer isn’t by far that person that creates layouts, codes these and uploads the files as it was few years ago. Nowadays, his job is very complex and it requires many hours of intensive work and a very solid background.
Designers need to be great communicators! Given a choice between hiring a designer who can smoke at Photoshop/Illustrator and designer who can write, I'll take the writer over the software guy (or girl) any day. Writers are generally good problem solvers.