All research and successful drug policy SHOWS that treatment should be increased!
And law enforcement decreased while abolishing
Mandatory
Minimum
Sentences!
Yes. They cut you off from all human contact. Feed you the most bland food in a bar form literally called nutrabars. Lights are kept on 24 hours a day and you're left in that place for as long as you refuse to work. Solitary confinement is no longer legal in most places but luckily restricted housing, segregated housing, and special or intensive management are the exact same thing but are completely legal still.
Oh you want to see other people and get fresh air? Guess you're willing to work now?
A thing to note about those kinds of practices. They quite literally give you brain damage. Humans require socialization, they require a day night cycle, they require stimulation. To not have those things will fuck you up, and even if you do eventually get out it will mean that your ability to reintegrate into society is severely damaged. It means you have a higher chance of recidivism.
In addition to what the other guy said, the parole board also looks upon it unfavorably. You don't want to be a slave? Well then, for your "bad attitude" and "lack of rehabilitation," get ready to serve your whole sentence instead of only half of it.