If we think about cars, they have been the same for almost a hundred years: four wheels, an engine, and seats. Overdesigning security to achieve the same tasks our current designs meet is a bad idea. Although hackers are continually finding new ways to break into systems, the most often used attacks are years old. Using the current security to its full potential in a simple manner is the best route most often.
Tap the Simplicity of Design link above to learn more about it!