sorry... but even if we accept that gender segregation has always been present - that still does not invalidate the observation that music was equally shared within the group. Last time I checked both sexes were members of Homo sapiens... or H. neanderthalis or H. erectus. And if there were taboos - you still just gave examples that both groups generated their music in common. It was not that only a single sex had exclusive rights to music creation.

And the current trend towards gender differentiation/inequality does not necessarily hold true for earlier cultures. That is an assumption that is untestable. It is also somewhat pointless quibbling... because at no point did you put forth an argument that within a culture with rigid gender roles, there was a further subset of music creators that controlled the generation of music for the larger group.