Therein lies the issue of the culture and values of the offender. We should certainly try to do all of that for practical and ethical reasons, but it's only going to work with those offenders who decide to change the value set that got them sent to prison in the first place.

We must acknowledge that some individs value their own and others lives differently than us, and treatment that might resonate with someone imbued with general cultural values and life skills like thrift, respect for others, personal responsibility, non-violent conflict resolution, etc may not with someone raised and imbued with the negative values and skills of a sub-culture of violence and criminality.

We've only a few windows to shape people's values for the long term, and some of our self-proclaimed "betters" have actively worked to disassemble the institutions our larger culture has evolved to successfully do so for the past going-on 60 years now. A person invested in those sub-cultures can be hard to reach.