Further – standards for looks and appearance are extremely strongly influenced by culture and society, including all the biases (racism, classism, colorism, sexism, etc.) within. If someone isn’t attracted to black women, but they are attracted to white women, for example, then it’s quite likely that this is influenced by broader society and culture, which dictates that lighter skin and European features are more attractive, in addition to the general vague (and sometimes not-so-vague) dehumanization that often afflicts societal representations of black people.
FWIW, in my personal experience, once one recognizes how strongly influential the biases of society and culture are, then it’s possible to overcome them and actually change what one finds physically attractive.