To clarify: it is absolutely necessary, at least for our current toolkit, to rob someones freedom in exchange for the safety of others. But that should come at a very high cost to the punisher: that is society in general as well. Whereas today, it is common to curse someone to "rot in prison" or to suffer torture at the hands of the state, the police or other inmates. That vengeance is not sated because freedom is not valued highly.