How about this: violently assaulting another person without an extremely good explanation (self defence, or a complete lack of sanity at the relevant time) should result in some of the heaviest sanctions in the legal system.
Where psychiatric problems are a cause, this should result in appropriate treatment rather than senseless punishment. However the community should be protected by some level of restriction and supervision until it can be certified that the risk of repeat offending is low.
Wrist slapping gave us this:
He had a criminal career laced with extreme violence and Justice Coghlan was asked to take into account his 60-plus prior convictions. Many included the use of weapons and a number of his assaults were against women.
So why, why, WHY was he walking around on the streets?