I wrote a million words in the first year, and I could never have done that outside of prison.
I can tell you this on a stack of Bibles: prisons are archaic, brutal, unregenerative, overcrowded hell holes where the inmates are treated like animals with absolutely not one humane thought given to what they are going to do once they are released. You're an animal in a cage and you're treated like one.
A just chastisement may benefit a man, though it seldom does; but an unjust one changes all his blood to gall.
Fear can be like a prison. It is, however, a self made prison. Many are imprisoned by fear. No one else can liberate them from this prison. Others may inspire them but they must liberate themselves.
It is not at the table, but in prison, that you learn who your true friends are.