The concept of 'involuntary manslaughter' is morally insane.

The concept of 'involuntary manslaughter' is morally insane. If you cause death without intent, it's still manslaughter, punishable by prison. If you cause death WITH intent, it's murder, punishable by prison. Why does our justice system disproportionately punish those who cause death WITHOUT intent?! It doesn't make any sense.