There is no music that can't be used politically, but the motives behind the creation of that music can be non-political.
What is a good performance? It lies in the hands and head of a performer... the shortest way between two people is not a straight line.
It is not possible, given any degree of optimism and generosity in regard to people in general, to set a time limit on creative reflection or a limitation on the number of people involved in the creation.
Cage's Music of Changes was a further indication that the arts in general were beginning to consciously deal with the ""given"" material and, to varying degrees, liberating them from the inherited, functional concepts of control.