too many training sources
I was trained by the Army, by martial arts instructors and by a law enforcement academy. On the LEO job, I had to quickly separate the the things I learned from the different sources to keep from doing something illegal. For example, the Army showed me how to break a man's neck. Martial arts showed me how to break bones and kill people if necessary. Law enforcement, of course, requires the ability to escalate and de-escalate all the way from officer presence to lethal force. As a private citizen, I am also required to not remain at too high a level of force for the situation. The appropriate level of force changes often and changes quickly over the course of an incident. We are required to keep up with the changes, and that is not always easily done. Too little force can get us killed, and too much force can put us in the cage.