The Ouija Board (along with other types of spirit board) was never intended to be used for the purposes we associate it with today. It was meant for "automatic writing" and people believed they were communicating with their unconscious self. Spiritualists of the late 19th century looked at it and said "no it's ghosts."
People are welcome to their own beliefs about spirit boards. Except for people who look down on others for having superstitons. Those people are assholes.