Blows delivered to any part of the head or neck can be fatal. It's just that simple. You should never strike anyone in the head or neck unless you would be justified in the use of deadly force. There are plenty of people spending their days in the custody of the state because they got into a fight, struck their opponent in the head, face or neck and their opponent subsequently died from the blow. What may have been no charge because of a mutual combat situation, a battery or aggravated battery charge quickly becomes manslaughter or 2d degree murder. Never strike the head or neck unless you are justified in using deadly force to resolve the situation you are in.
I was referencing situations where the whole point of intervention, was to save a Life, or, to defend one's self against imminent bodily harm or death, if leaving and evading was not possible or morally acceptable
I'm glad you had years of special training and techniques.
I do not.
If punching someone in the Jaw or Temple is not acceptable to you, to save one's own Life, or the Life of another, or to prevent grevious bodily harm to one's self or another, then, lets just agree that I respect your opinion, and it is duely noted.