Doesn’t mean there was. Doesn’t mean de-escalation shouldn’t be tried.
It's not some magic spell that makes the impossible happen.
The use of psychology and being humane certainly can be impactful when it comes to de-escalation. The more you require a person to think, the less raging and irrational they can become. It isn't a magic eraser, but it sure the heck is something that should be used before lethal force. You can only justify lethal force when lethal force by others is imminent. Being a pussy and thinking you are going to die because someone else is being irrational doesn't count as "imminent threat of lethal force."
It's this sort of attitude that's why America is now screwed--people are tired of appeasement becoming the normal approach and drove us to jump from the frying pan to the fire.
Not killing a person isn't "appeasement". You should be
ashamed to make such a void argument. The word you should be reaching for pragmatic and humane. Treating people that are of ill mind like human beings can actually go a lot farther than you appreciate (are capable of appreciating?). Remember the whole "whatever it takes" justification for "enhanced interrogation"? The pro's were protesting, indicating that there are much easier ways to get into a the mind of suspect using psychology. The goal in these situations isn't to appeasement anything, but to
prevent violence. Killing someone isn't preventing violence. Of course, not everyone is trained in de-escalation techniques. In fact, it seems more people in the US are trained to kill than to de-escalate.