This is not a question of about parroted nonsense and cultural norms. I mean what end product do they produce that justifies their existence in the first place.
I’m physically disabled and have been living in a prison like situation for nearly 11 years. How does my situation balance into the ethics of prisons? I’m on a path to homelessness and a premature death due to institutionalized neglect and abuse from US institutions. Criminals are housed and fed in exchange for similar isolation, abuse, danger, insurmountable debt, and a largely unemployable and destitute future. These seem to conflict in ethics.
It’s a little jarring seeing a post like this alongside a post celebrating the possibility of jailing people for doing a nazi salute. Anyway to answer your question, some people cannot function in society. They are dangerous, and the only way to prevent them from harming others is to isolate them from society.