I have another thought about her reasons as well....she does her art work and sells it as a “black woman” - perhaps it wouldn’t get noticed as a white woman selling images of emotional slavery...
I think at the beginning it was psychological, her parents adopted 4 black children, I think she was jealous of the attention they were receiving and wanted to be black too, the rest of it is just what happens when you think like a liberal, everything you do is justified