People need time to grow up so we can see how well the eugenics or gene editing have worked. An AI can simply replicate itself in the time it takes to copy data over, see how well that works then do it again with no loss of resources. It can make any number of varied copies of itself almost instantly in any number of sandbox environments to see which changes work best then turn up the clock speed and see how they fare.
Machine-Written Books
Christian Brooks
Connor Edwards
Nah, they've basically identified all the "g-loaded" genes already. Ubermensch soon