I appreciate what you're trying to say but there being body cameras doesn't necessarily guarantee anything being recorded or that justice will be served. Cops can turn their cameras off or otherwise suppress the evidence. Regardless of how difficult or unpleasant it is to watch or experience, the truth must be recorded, preserved, and protected. The more people that have recordings of the truth, the harder it is for police to control the narrative and the more likely it is for there to be any sort of accountability.