Why The Others Can Raise And Control Wights (ASOIAF Theory)

One of the few things we know about the others in a song of ice and fire and game of thrones is that they can raise and control the dead. They command these armies of wights to attack the world of men. But why and how can they do this? I think the answer makes sense with what I have theorized the others to be and the connection to the weirwoods actually could make this mystery make a lot of sense. Let me know what you all think. If you want to see my video about what the others actually are check that out here https://youtu.be/kcNa964eP7Q