Violence is bigger than all of us. Just as we will never understand people fully, we can never understand a subject as convoluted and complex as violence.
Unless you’ve been exposed to a lot of violence, your training will be subjective. Most people’s idea of violence is one based off their own interpretation of what they learn in the dojo, see in the ring, or watch in a movie. In rare cases, it comes from personal experience working as a police officer or prison guard. But how many of us deal with violent offenders daily?