I love good graphic design. I've actually never met an actual graphic designer who bought this shit. There are much more advanced theories of design harmony. This kind of stuff always seems to come from graphic design enthusiasts, not professionals.
It's like the CutCo of design theory. You're like "WHOA IT CAN CUT A TIN CAN IT MUST BE AWESOME" but pro chefs don't cut cans or use CutCo knives.