They deliberately hold us just above the surface of the phenomenal world and downplay physical realities. In place of sensory awareness, they clearly encourage the viewer to search for abstract relationships and secret meanings. It may betray the work it seeks to explain. Since abstractions by definition exist outside of time, they eliminate the process-aspect of experience. They push the pause button on life and art, translating flowing, changing perceptual events into static intellectual patterns.
Movies move, but metaphoric generalizations stand still.
Furthermore, abstract conceptions have a clarity and simplicity foreign to perceptual experience. They smooth its rough, uncertain edges, making what is sensorially noisy and emotionally fuzzy into something intellectually sharp and definite. The truth of conceptions is fundamentally different from the truth of perceptions. Conceptions represent the possibility of essential truth. Perceptual truth is never like this.