"Drama is not a visual form of literature" and "The dominant technique in drama is narration" are two examples of false statements regarding the nature of drama. In fact, drama is a visual form of literature in which the dominant technique is dialogue.
Drama uses the techniques of literature, including plot, setting and character-driven stories. Also like most literature, the author's voice goes unheard throughout the piece, appearing only during stage directions.
Another example of a false statement is, "In drama, the written word is the same as the spectacle of performance that the audience sees." In fact, drama is the written word, which is separate from the presentation, which is called "theater."