In my worldview self-defense, including defending others, always uses the minimal amount of force to reduce further harm. And I would expect a police officer to

In my worldview self-defense, including defending others, always uses the minimal amount of force to reduce further harm. And I would expect a police officer to have the skills and composure to do so in the general case. Bad things can happen and mistakes are human and all. The trend you describe is disheartening. Not just for individual ethical concerns you mentioned, but also in the context of state violence. We give the police the right to use violence. It's a massive responsibility and when it's abused, it leads to spiraling effects.