Designers should learn to code...

You can have the normal graphic designer, or commercial artist in Australia, but if you knew a whole heap about graphics, would you learn how to code as well? Would you stick to creating graphics, rather than applying it to web sites, forums etc.?

I prefer to learn both as it prepares you more for the future if you where going to actually do this in future

You can only do so much knowing the fundamentals of design. Typography, color theory, composition, etc. are all fantastic and extremely important skills to know (and know well)…but eventually if you want to excel in your creativity, you must learn the tools of the trade. Painters learn about canvas types, paint compositions, and bristle qualities. Web design is no exception. Learn to code: you’ll be better for it.