Punishment Vs Confinement In Prisons

Prisons contain offenders and prisons have become the largest housing of mental health offenders.
Prisons have evolved from just containment and confinement. Inmates are highly adaptive and should be provided a meaningful life while in prison. Punishment is not the responsibility of prisons, changing behavior is. Prison can become safer when inmates are allowed to have some sort of meaningful purpose. There is no doubt that punishment is the concept of barbarians. The threat of confinement and confinement alone are punishment, anything else is comparable to the Romans sending lions after Christians in the arena. Humanity can only be improved by assisting people in growing intrinsically as well as improving skill sets.
Currently I think prisons