That identifies the principal problem in policing and the community (and likely the first domino in racial disparities). Glossed over often because it's not illegal and reinforced as correct because of all the resistance and violence police actually encounter (neverminding their own contributions to the likelihood of those actions).
Right, the principal problem is we take a group of people that self-select to be law enforcement officers (applicants), train them to expect violence in the course of duty and to be prepared to respond with superior violence, including life-threatening maneuvers like choke holds and potentially deliberate life-taking actions like firing a gun, then throw them into an us v. them situation where the "us" expect you to be tough and loyal to the "force."
Cops are trained to focus first on catching bad guys, not helping victims. When dealing with crime and victims, they are trained to be objective fact observers so their reports and testimony will be reliable at trial (including civil lawsuits) rather than people assigned to help deal with the fallout from crimes and accidents.
Just look at what happens when a cop shows up at a car accident. Their goals are 1) determine if anyone needs an ambulance by looking for obvious physical signs of injury and asking if you are okay, 2) clear the road, 3) collect statements from people about what they remember (at time when those people should be focused on processing the emotions from a terrifying event) and 4) decide whether to give someone a citation.
Generally missing from police reports is information about the perceived mental state of the people involved in the accidents. Cops are trained to go against their instinctive human compassion and remain dispassionate fact collectors and observers. When a cop asks if you are okay and you say yes, they don't come back with "Are you sure, you look really shaken up. Don't worry, I deal with these kinds of accidents all the time. Once the adrenaline goes away you'll be fine, but you should probably take some advil and try to rest, because you might have some pain that you won't start to feel until the adrenaline subsides." Nope, cops are taught not to show emotion because that would taint the record, so they just write down you said you were fine and they didn't see blood and then start asking what happened, how fast were you going, did you see the car that hit you, etc...
Compare that to the people involved in the accident. The person who got hit is probably rightfully pissed, but instead of screaming at the driver who is to blame, they usually recognize the person at fault feels like shit and they show that person compassion. Thus, the people involved in the accident tend to exchange reassurances about not being hurt, how the situation sucks, that they know it was an accident, etc.... Yes, they might sue you later, but at the accident scene natural instinct takes over and they are usually pretty polite and compassionate. The cops are focused on making sure their natural compassion doesn't interfere with their objectivity.
Power corrupts. Cops are given power, trained to use it, expected to use it, and there is little training and oversight to make sure they control the desire to abuse their power. It's no wonder a lot of cops become a*holes, either temporarily or permanently.