To me, this speaks to something entirely different: the idea that a complex system that works cannot be designed from the ground up, but must necessarily evolve from a simpler system that works.
1. Manhattan project: The Hiroshima bomb was only tested once. The Nagasaki bomb was a different kind and never tested in advance. The whole infrastructure to produce those bombs was created from scratch within three years.
2. ICMBs: It required to shrink down nuclear bombs to put them on rockets, develop the capability to steer rockets precisely enough over thousands of kilometer, create a whole industry around the manufacturing. Then scale it up to hundreds of rockets.
3. Put a man on the moon. Nobody died at the first attempt.
You could consider those three steps as an example of Gall's Law as they build on each other. However, I would say each of them is a complex system in itself.
For an example of a complex system (and how unintelligible they are), see this diagram of metabolic pathways in the human body: https://www.sigmaaldrich.com/content/dam/sigma-aldrich/artic...