I’m looking at a pug right now. Uhhhhh…

It works if you know the traits you’re trying to optimize for and don’t care about the mistakes. We don’t know that for humans, and we do care.

I think you’re mistaking science for psychopathy. Proper science would recognize that humans are social creatures and therefore our actions have impact across society, and we need to take that into account.

Also, try and breed two very smart people. You rarely get a stable smarter person.