How to evaluate the shaman profession in Blizzard series games?

When I first heard about shaman, I was surprised. Anyone who plays World of Warcraft knows that this profession originated from the shaman sacrifice of North American Indians, but it is not the first time for the northeast people to hear the name shaman. There is also a shamanism in the northeast, and it is a very extensive group. In the words of ordinary people, it is a great god. The doctrine of Manchu shamanism is to communicate with ancestors and with natural gods. Shamanism is Manchu. I don't know how many years it has existed, but the state religion of China in the Qing Dynasty was Shamanism. If you count, shamanism will last at least 500 years. But the question is why the pronunciation doctrine of Shamanism in Northeast China is the same as that of Shamanism in Native America.