This is where you can find what each job does exactly.
All of the base jobs are very important for example in order for an enchanter to enchant a single item they need something to enchant. They get this because the blacksmith made it, but the blacsmith could only make it because of the miners. The miners could only do their job because of their pickaxe which they crafted from the logs gathered by the lumberjacks. Then the enchanted needs xp, which they got from the traders who traded for it with emeralds most likely gotten from trading wheat gathered by the farmer. Then everybody needs food made by the baker who also gets resources from the farmers and miners, AND they are all being kept safe via the solders WHO are lead by the leader! So everybody needed to contribute in order for a single thing to be enchanted!!