Sitting in his office, he made a nice mathematical model, and it never occurred to him that what he saw as defects were actually necessities. Look: when I was working on missiles, we dealt with something called 'resonant yaw.' Resonant yaw meant that, even though a missile was only slightly unstable off the pad, it was hopeless. It was inevitably going to go out of control, and it couldn't be brought back. That's a feature of mechanical systems. A little wobble can get worse until the whole system collapses. But those same little wobbles are essential to a living system. They mean the system is healthy and responsive.