The point is to avoid it escalating to that point. Something it seems most big city cops aren't very good at these days.
The real problem is that in this environment...there are a lot of criminals who believe that police are now so afraid of getting charged with a crime themselves that, the criminals, resist with impunity, just daring the police to do something about it. That is hard to de-escalate. Honestly, a lot of police I know are afraid of getting charged, or shot themselves and they are more focused on that than anything else.