The problem is that humans didn't evolve by natural selection, but by tribal warfare, which is a very unusual high-speed form of evolution that modern academia is loathe to admit. Most human traits, such as having free lubricated arms to wield weapons with, religion, intelligence, communication, culture, morals, altruism, bravery, can all be traced to their advantage in war. And shockingly, most cosmetic preferences were made by mothers, favoring for example babies with blond hair and blue eyes over siblings without. It's hard for us to understand in modern times but mothers had more mouths to feed and significantly less reliable food sources, so often had to choose which children lived. Some cosmetic traits were chosen by men, such as big boobs and blond/blue surviving into adulthood, but the original blond hair/blue trait was cultivated by mothers.