I think this is too broad. A police officer in danger of a black eye doesn't get to respond with deadly force. Someone who poses a danger of shoplifting to the community doesn't warrant deadly force either. I don't think anyone disagrees that an officer in imminent mortal danger is justified in responding with the same, but I also think that we can hold them to a standard of accepting some lesser risks without killing people.
My wife works with individuals with special needs. Some of the folks she's worked with have been young adults with severe autism. A few had very significant physical behaviors, almost always stemming from underlying communication and sensory issues. I watched my wife put herself in danger to deescalate situations with students twice her size. Sometimes she got bruised or bit. She never once applied violence in return. This is a story that plays out with mental health workers, special education teachers, social workers, EMTs, and nurses every single day who manage to deal with scary situations and not shoot the people they're responsible for keeping safe. I don't think it's anywhere near unreasonable to only accept police officers with that same minimal level of bravery to put themselves at risk of minor harm rather than killing people.
i should have said in mortal danger. Or at least had reason to believe they were in mortal danger.