Yup, right up there with leeching
Actually, leaching *does* have medicinal benefits. Doctors have learned that leaches can be used effectively in the reattaching of severed body parts. They've also found benefits in the use of maggots (they eat infected flesh, but don't bother the healthy flesh surrounding it)
Got a headache? We'll drill a gaping, untreated hole in your head to release the "bad spirits"!
Hate to break it to you, but this is used by modern medicine too in order to relieve cranial pressure caused by fluid buildup.
So, despite your cries of "it's all bunk", "new" discoveries involving old techniques are not uncommon. That's not to say that *all* old cures and treatments work, but just because someone scoffs at something as unenlightened doesn't mean it really is.