Different cultures have access and then value different cultural expressions. Asking why there isn't the japanese Bach is a bit like asking why there is no span

Different cultures have access and then value different cultural expressions. Asking why there isn't the japanese Bach is a bit like asking why there is no spanish Lee Changho You could make the argument of how elaborate is a piece of art but in the case of individuals like that they are so far off from the median person in their culture that it'd be quite hard to see their achievement as coming from their culture instead of their own cognitive abilities. The societies they grew into either fought them or allowed them to strive but that's about it.