Because the Free Market Economy and the Chicago Boys. Milton Friedman inspired most of the miracle. Pinochet was an ignorant that has no idea of economy. If you want to thanks somebody, thanks to Admiral Merino. Argentina and Venezuela has lagged behind because they don't have the practical approach of Chileans to development. But it is something that is changing. Today the country that grows faster in the region is Peru, actually.
Cultures evolve differently because of different historical circumstances. It has nothing to do with testosterone levels.