> Because when there are no options left, you only have force.
It actually makes it worse that you try to justify it. You used your brainpower to find a justification for what is. But there is none. This is a non sequitur - there is no reason to use force even when people don't cooperate! Also, the vast majority of such instances require no special level of competence to deescalate, only common sense and decency, including a lot of police incidents I had to read about (I myself never had an issue with US police, even though I encountered them a lot when in my youth I crossed the US sleeping in an old car that I had bought).
The entire "deescalation" that was required in this particular case was to just let it be. What training do you need? Not even the next step of offering just a tad more money needs any special training. You make it sound as if we are talking about hostage negotiation or something requiring skills.