I cannot overexplain how anarchists seem to think you can safely rig makeshift bullshit like yes I have no doubt that someone with experience and the appropriate lab could produce a chemical but instead it's always some stupid shit with plastic tubing and cut up milk jugs literal meth lab style drug manufacturing. Heating apparatuses as likely to explode into flaming liquid and shrapnel as they are to warm someone's hands. Rarely a second thought for the entire practice of engineering, or material sciences, or chemistry, or manufacturing, or any of the dozens of disciplines which we have as a society spent centuries refining. And no appreciation for the extremely tangible benefits of standardization and mechanization. There is a reason we have people who design processes, and people who build machinery to execute those processes rapidly, exactly, and reliably. Inconsistency is not something you can afford when people's lives are on the line, delays are not something you can afford when people need consistency of care. The immediate critical future of entire sectors of your community cannot hinge on improvisations.