ever watch or look at the photos from the World Cross Country Championship? There are plenty of barefoot runners in the lead pack, female and male. Every year if you look at the photos you will see several Africans running barefoot. They may not be the top Africans but they are plenty good, and would be considered great anywhere else! A couple of years ago they ran on very difficult course with rocks, cinders, and pot holes, yet had no problem running! I have always noticed several runners each year at the World XC championships running barefoot....if they are at the meet.......they are elite!.....Later some get shoe contracts and you will no longer see them barefoot.
maybe you are not looking close enough!....google the world xc championships....every year they are barefoot runners!