I think you're wrong. Humanity won't destroy the golden goose. The next Aaron Swartz will release it to the public, whether that's distributing the software to everyone, or finding a way to freely build/distribute high-level robotics.
Just as Prometheus brought fire to the humans, someone will find a way to prevent the future from being locked away. Once you achieve the necessary level of automation, you only need one fabricator that can build the next.