The article does give an answer though. An "anarchist community" would not suddenly appear out of a vacuum and have to re-create everything from scratch. Arguing like that is indeed a tired trope and lazy strawman.

So any real "anarchist community" would have existing tools to make insulin (like the article says) and thus sufficient time to adapt them or come up with other means to produce insulin that are better suited for a non-hierarchical society.

It is a bit moot to speculate what these adaptations or alternatives might be, as we don't know what this specific "anarchist community" will look like. But if you have experience with process engineering you might realize that existing production methods are rarely the best or most efficient, but rather a result of the pre-existing equipment and capabilities at the time of developing the process. Furthermore existing production processes are rarely further optimized unless there is a strong outside pressure to do so, and in today's society it is usually easier for companies to rely on patents and monopolies to extract the maximum profit.