I think, these are all criteria of seamlessness, something, which an artificial composition must manage as well. Images, on the other hand lack the temporal dim

I think, these are all criteria of seamlessness, something, which an artificial composition must manage as well. Images, on the other hand lack the temporal dimension, variations in tempo, musical tones and scale, emotional impact, etc, which are crucial to seamlessness and continuity in music. The problem really arises with framing, composition, readable intent and motivation, i.e., general terms of expression – and image generation doesn't exactly shine here, as well. (The answer to any motivational questions will probably always be, "strongest signal". An artistic motivation will probably never be to just express the strongest signal in a common cultural context, rather, it will be contrast and interpretation. Otherwise, we should start worrying about that given society.)