Why are there so few people in the world able to run 100m in sub 10s? The basic concept is out there: run very fast. Lots of people running every day who coul

Why are there so few people in the world able to run 100m in sub 10s? The basic concept is out there: run very fast. Lots of people running every day who could be poached. No shortage of those I assume. Good running shoes still seem the most important to me.