Well, if you grew up in the West it's reasonable to infer that you would subscribe (at least to some extent) to Western conceptualisations of attractiveness. People underestimate the power of propaganda and popular culture.
Even before the advent of Western colonialism, certain groups already greatly valued light skin, so Europeans were already in prime position to benefit from that.
When our God-forsaken continent eventually pulls itself out of this unenviable position... it will obviously have to create and impose its own conceptualisations of attractiveness -- and Westerners won't be part of that.
I find it hilarious how people really believe that their perceptions of what is attractive isn't mostly influenced by popular culture and society at large. A lot of the things we find beautiful are generally features we've been socialised into finding attractive. Obviously, you'll get a small percentage who march to the beat of their own drum and have unique tastes.
Hence, generally speaking beauty is subjective.
If Sub-Saharan Africa was to ever become a super power and it's citizens were richer and more educated than the rest of the world, the world's beauty standard would be a stark contrast to the standards we have today. Dark skin, kinky hair and wider features would be seen as desirable. The world is a rather unpredictable place, you never know lol that could happen in the future.