My point is that taste in music is vestigial since the invention of writing. Before that it was a selective advantage. Even if amusia (of which musical anhedon

My point is that taste in music is vestigial since the invention of writing. Before that it was a selective advantage. Even if amusia (of which musical anhedonia is a subtype) was prevalent at the time, culture transmission operates at the group level. The mere existance of amusia with such a low prevalence doesn't invalidate my point.