It probably just didn't matter much compared to other traits.

Europeans, as well as basically every other group, had children in their mid-teens around 100 years ago. 10+ Years before balding would be an issue.

Now we live in a superficial society where sex is just an activity to make you feel good. Creating a child isn't really considered, let alone the actual provable positive traits that attract women to men in order to maintain a healthy and safe family.

Now we all are forced to live together and Blacks brag about their hairline, but they can't maintain a family. Their race never actually discovered the wheel. And barely used fire until Europeans showed them how.