How to explain the high status of witches in Yin and Shang Dynasties?

Few people can test the history of Xia Dynasty, but in Shang Dynasty, slave owners and nobles were very superstitious about ghosts and gods, and clergy officials such as Dazhu, Dabu and Si Wu were set up in the ruling institutions. At this time, the status of witches is very high. They not only participate in political and military decision-making, but also predict the good and bad luck of diseases for the rulers. They think that diseases are completely independent, just like clothes, they can be put on or taken off, and wearing and taking off are completely controlled by troublemakers.