You really only need medicine to keep you villagers alive who know how to do their tasks---albeit they have the attetion spans of gnats. You'll learn what the people look like who "usually" stay on task. If everyone did what they were supposed to do, you'd quickly finish the game. They are all individuals who add the necessary challenge as I see it. Right now I have one woman who is almost a master farmer. I've yet to figure out how that happened since she spends most of her time wandering around.
Gail