Brave new world why aren't upper caste children bokanovskified

In a Brave New World, the upper caste children are called Alphas and Betas.  The Alphas and Betas are not Bokanovskifed because it is reserved for the lower classes.  The lower classes are not as intelligent as the higher castes.  This is the reason they go through the Bokanovksy process. 

Friedrich wilhelm nietzsche was a german philosopher and philologist and were an important influence on the nine inch nails as well as the existentialism movement. he challenged the christianity as well as the traditional morality thus was being charge with atheism, relativism as well as nihilism.