These other composers didn't follow Schoenberg but invented their own rules of composition. Schoenberg unleashed a genie on the world. In 1943, Germany was burning a people, composing the darkest cacophony that man could conceive. In other compositions, he used a variety of radios or altered tape recordings all playing simultaneously, or microphones attached to human bodies in motion. A piece for the piano in which the pianist sat in silence in front of the keys of the piano for 4 minutes and 33 seconds.
Art reflects life.
Music reflects life. As part of the Creation, Hashem wanted there to be a tangible symbol of His Kingship. From this symbol we would be able to catch the smallest glimpse, the most distant echo of the Glory of Heaven, its Awesomeness and its Majesty. For this reason, Hashem created monarchy. Earthly monarchy is the most distant whisper of the ineffable Majesty of the King of Kings.