Going back to what I said..
This is entertainment, no one is entitled to anything. There are no work unions, there are no laws against discrimination to protect you. There's no affirmative action in entertainment.
That being said, there's nothing really to address. You kind of have to deal the cards you're dealt and decide if it's the place for you or not. Some will choose to stay for the love of it , some will not.
At some point maybe R&B will return to being trendy. Right now it's kind of not.