That's a very liberal view inconsistent with justice. If you rape, murder, engage in paedophilia, sex trafficking, etc., just once, that's once too many times. You've broken the social compact to the point where you need to pay dearly.

I don't feel sorry for the evil in our society. These people cost us dearly by dint of housing them, feeding them, providing medical care, entertainment. All the while, their dead victims, their raped and permanently-violated victims get no justice other than knowing that the evil person is behind bars. That's not justice. That's sweeping it under the rug and calling it good. It's intellectually dishonest to say the death penalty should not be used for heinous crimes. It breaks the social compact with the victims and society at large.