Instead of assuming that she did this for purely selfish reasons, say she truly feels that she's black and wants to be black.
Obviously, genetically she is not black.
How is this any different than the Caitlyn Jenner situation? I accept Caitlyn as a woman because that's who she wants to be. Obviously, genetically Caitlyn has the chromosomes of a male. But if Caitlyn wants to be a woman, I'm going to support her and applaud her.
Again, how is this different? I can condemn the toxic deceptive behavior (that example of the photo Simon gave in the OP), but I don't think I can laud Caitlyn in one sentence for being who she is and then condemn this woman for being who she is if that's all she was trying to be.