I get the forgiveness side but comparing revenge tendencies to alcohol and drug addiction is looking for away to justify the issue. Oh he’s addicted to revenge and needs counseling. I’m not buying that.
Responsibility for your actions. You make a bad choice you need to pay.
While I can see the possible virtues of treating it as a mental illness (drugs, therapy, etc. for recidivists) I can’t help but think of how that could easily be abused. E.g., the (IMHO) overdrugging of youngsters for ADHD.