Speaking as a non-american, non-white.

Representation is mostly an american issue, most of the world doesn't have problems with it; when I was a kid, we played to be anime characters, us cartoon characters or local heroes depending on tv popularity. I can understand that in the segregated America, having a hero of your etnicity is important, but none of us cared about the skin or ethnicity; it wasn't an issue in our local culture.

On the other hand, shaming another culture into having the same perspective as your own, it's the book definition of cultural imperialism.

EDIT: BTW, I do think Scarlett is a poor casting choice.