I think this goes to my point. It’s a tighter, more consistent genetic pool, and yet they all used different, individualized training programs. Even with seemingly similar, superior genetics you still have to assess and adjust to the needs of the individual. If you had looked at the above mentioned athletes and said “Oh, they’re all Jamaican, we’ll simply train them this way,” and then used the same cookie cutter program for all of them, they would not have achieved the success they did. Would they still have been great athletes? Probably, but they might also have been ruined or ended up injured before demonstrating their talent.