they are cheating you, because you will read what you want to read. You don't hear a voice, when you read, so what do you know about the intentions of the author? Nothing - you don't know if he is thoughtful or hateful, if he wants to just cheer you up or smack you down. A written conversation lacks everything a conversation is good for: the compassion and the communication of feelings that you hear and see when you talk with someone face to face.