Did you even read the post?
Quoting:
Over the past three decades, numerous state and federal prisons have made long-term solitary confinement a default management tool, subjecting prisoners to conditions of extreme isolation not as a response to violent behavior but rather as a routine practice for minor rule infractions, and for their own protection.
This is a horrible thing to do to another human, especially for minor infractions that do not involve violence.
And not every prisoner is an axe murderer.