> Earlier this year there was a homeless man waving a knife at pedestrians a few blocks from my house. I know this is a mental health issue and we need do do more for our homelesss - but I couldn't ask officers to deal with stuff like that on the regular with little or no protection.

This is actually a symptom of a much larger problem: the US defunded public mental health institutions years ago, and many people that are a danger to themselves and others became homeless. When you defund the very institutions designed to help these people, and militarize the police, you get the expected outcome: mentally ill people getting shot for "resisting arrest."