This is a very good topic but the article does a poor job at explaining it.
The issue with insulin is not really the technical feasibility but the required economical organisation to produce it. How can an anarchist community produce insulin, or anything complex without leaders or economical motivation? This is the question the article fails to answer. I have no doubt it would be feasible but a long argumentation on the subject would be nice to read, instead of this "I'm tired of the tropes, so I must be right" nonsense.