The only thing that matters in casting is who is going to bring in the viewers and the money. Not race, not gender, not orientation. If they want to cast Oprah Winfrey or James Woods or R2D2, the only thing they should consider is which one is going to bring in the money.
An actor is there to act, to take on a roll that they are given. They don’t have to be of any ethnicity or sex or orientation to do that. Authenticity is a chimera and all that matters is how this entertainment it going to be paid for.