Ok, let's clarify.
We both agree that the technical aspect is not an issue. So let's drop that point.
The question that usually comes up is, how might the community / organisation be structured in such a way that complex and critical goods can be reliably manufactured?
I'm interested in theories and proposals, methods by which this could believably be implemented. Nothing will happen without at least a proposal or blueprint to base discussion or action upon. Proposing to tear down the current system without a single idea of how we would replace critical functions is utter foolishness.