I am saying let the voice director/caster decide who plays the voice. If they want a person with an Asian accent playing a white character, then thats what they want. If they want a person with an European accent playing an African character or vice versa, then that's what they want. Let them pick. They know about the project and usually the intention behind it. They will know the sound they want.

Im not saying they should pick based solely off of skin color. Pick based off of voice sound. Sometimes someone will say they want a specific race but what they really mean is that they want a particular accent common to that race or nationality.