Don't leave anything for evolution to work with.

But we want some amount of psychopathic traits in most people, and a rather large amount in a sizable minority. Genetic recombination will necessarily pop out some psychopaths.

If you eradicate too many psychopathic traits, every manager will sprout pointy hair and there'll be no cool heist movies!

psychopaths may be perfect candidates for testing post-cryogenic restoration

We have perfectly good methods of locking up people. A bit of eugenics to kill psychopathic fetuses before they be people sounds good, but using existing people as guinea pigs for cryonics? That's cold. (rimshot)