What happens when body cameras dispel the myth of the noble poor? Will you scream invasion of privacy when thousands upon thousands of hours of camera footage of police dealing with jackasses is released? When the vast majority of shootings involve armed criminals refusing to comply?
Perhaps in your ignorant fantasyland police officers are robots who awaken each day unaffected by their previous experience. Are there turds? No doubt. Do even these turds deal with other turds daily? You bet. Body cameras will fix neither.
I'm sure the various police departments throughout the country and ready and waiting for you to produce these magical humans who daily venture into shitholes inhabited by violent people yet remain rational and emotionless, possessing the power to expand time in order to choose between multiple non-lethal options when dealing with non-compliant criminals.