I think it’s a good idea to expand the first part by noting than much of what we now know is valid medical knowledge came from folk sources; birch bark (aspirin) to treat headaches, removing an arrow from your knee to treat the condition of having an arrow in your knee. Many things were successfully used without the benefit of science. As it stands the article smells of the tendency of some modern skeptics to disregard the sum total of all human knowledge acquired before they personally started kindergarten. Clearly anyone who did not have wifi was an idiot and anything they did was stupid. On another note; if the attempt is to show the danger of replacing modern medicine with folk remedies take "prune juice" out of the examples. Prune juice is often recommended by doctors. Better yet, go buy a few quarts and do your own research. It won't be pseudoscience to you anymore.