No one suggested this.So you would advocate for the death penalty to prevent the possibility of rehabilitation?
I would advocate the death penalty when there is no other means available to protect society from this individual.
Not always. And we have no guarantee that the criminal can no longer harm.Regardless, your argument is specious. Any criminal up for the death penalty could instead be given life without the possibility of parole.
Were we truly able to keep criminals locked away forever where they could no longer harm others, the argument may be considered specious. But there is no such system available.