Druids for example actually studied for like 20 years before becomming one and it also involved many personal sacrifices. That is not a joke, that was 20 years of intensive studying, training and sacrifices before being counted as a druid, that is more than is expected of doctors today, so think again if you ever thought just being a loony and sitting around taking drugs got you qualified as anything even in ancient times in many ways a lot more was expected from you than it is today