You misdescribe your link and so are off by a factor of 8. Your list is of the ~10 people, all west African, who have set records faster than 10s. Here is a list of 80 people to have run that fast. Immediately above that on the page is a list of the 2 or 3 non-Africans and the 2 south Africans to have run that fast.
It’s potentially misleading to quote a statistic like that in isolation without describing the base rate. A quick scan seems to imply that nine men whose ancestry is predominantly West African have ever run 100m in less than ten seconds… which certainly seems to support your point anyway, since less than nine elevenths of the Olympic talent pool is from West Africa.
You misdescribe your link and so are off by a factor of 8. Your list is of the ~10 people, all west African, who have set records faster than 10s. Here is a list of 80 people to have run that fast. Immediately above that on the page is a list of the 2 or 3 non-Africans and the 2 south Africans to have run that fast.