It's color theory. All schools that have any semblance of creativity involved teach it. You're calling it crap because you see it often, but it's actually based behind the actual theory behind complementary color use. It's effective whether you like it or not.
That being said, this cover art for Fuse is a complete joke...and not just color-wise. The composition is absolutely horrible. Their crotches are the CENTER OF THE COVER...why is there so much empty space below the picture?! Why does nobody have a face! It's deliberate but it's not good design.