That's an interesting nuance, KJ. Though it complicates matters hugely when it comes to deciding who has earned the right through their inner qualities to adopt the voice of another. Who is 'integrating' or 'assimilating', rather than 'appropriating'.
In theory, audiences would vote with their hearts and ears, but often convenience, insouciance and record label preference for marketing purposes will mean that the 'unworthy' achieve success at the expense of others. I'm probably overthinking this. I tend to.