This old defence. Trotted out by brainwashed chickens who are so terrified by the world they need to put their unthinking trust in the mighty cops and government.
A job that is way more dangerous than cop is convenience store worker. Should we give them carte Blanche to shoot every customer that they don't like the looks of?
Yeah cops deal with bad people - big deal, cops volunteered for the job. If u can't be a professional you can't be a cop.
The military deals with a lot more bad shit than cops and somehow the military has way better control over its soldiers. They don't go around killing civilians whenever they get scared.
Cops are often weak on a power trip or just plain racists with impunity. Face that fact and America might start fixing its cop problem.