Music is organized sound, but not all organized sound is music.(imo) The ticking of a clock is organized sound . The running of an engine is organized sound. Etc. I would not call this music, even when I find both sounds worth listening to (John Cage might not agree with me on this point.) His statement is right , but I may not agree with the use he puts this statement to. It gives him total freedom to work with sounds as he pleases and he may call it music. If he pinches the cat at intervals so that it mews?(cat sound?), it's organised sound and so it's music.
Art in this time , in the leading circuits, is mainly a philosophical debate, in both audio , visual and performing principles. (Architecture has the built in restrictions that it's products must be functional.)
When they put those philosophical ideas into visual or audiable forms they often have a lot of explaining to do.