A very obvious answer is that, for example, film was toned to white tones, which meant that film was not as good at capturing people with black skin on film or in lighting. Another example is of course facial sensors seeing white people but not seeing black people (which informs one of the funniest episodes of the defunct show Better Off Ted).
You say these are superficial features and yet the reality is that skin color drastically impacts one’s experience of life in this world.
Therefore if one is designing products, why would you exclude the perspective of people who would ultimately use your product?
