I agree with you. I've even represented a number of clients. However, isn't it up to the sentencing judge to tell the individual who is before him: “Sir, we've tried everything with you; we believe that you should be removed from society for a number of years, and I'm therefore going to sentence you to 25 years”?
I've had clients who were rehabilitated after 22 months of detention. Where do you get that statistic, that 20 months isn't enough to rehabilitate a person?