Honestly this seems like a bonkers denial of reality: the State is exactly the embodiment of the use and monopoly of violence. Pretending otherwise is ignoring hundreds of years of empirical data.
We aren't denying or even objecting to the state's monopoly on violence. The problem is the word "punitive" there. State violence should be a means to stop other violence. It shouldn't be used as a punishment by itself (beyond more indirect forms of violence such as denying someone's freedom by putting them in prison).