15 Then Samuel said to Saul, "Why have you disturbed me by bringing me up?" Saul answered, "I am in great distress; for the Philistines are warring against me, and God has turned away from me and answers me no more, either by prophets or by dreams; therefore I have summoned you to tell me what I shall do."
No, it’s you who doesn’t understand Familiar Spirits. If a witch has a “Familiar spirit”, the spirit speaks through the witch. If you think an apparition of Samuel was in the room, wouldn’t Saul have hugged it or shook his hand? Weeped on his shoulder?