Everyone else has to operate under the premise that if they screw up or intentionally engage in misconduct, especially if it results in the death of another, there will be repercussions for their behavior.
Why do you believe that law enforcement and their officers are the only occupation that can't do their job properly without full immunity for when they screw up or commit misconduct, along with the resultant consequences?
I don't, and there are very few jobs that do.
I was a truck driver before I retired. If I got into an accident that was my fault (which never happened) the harmed party could sue my company, but they couldn't sue me. My father was a bricklayer. If he built something the wrong way, the customer could sue the company he worked for, but not him.
Outside of medical and self-employment (even they have bonds and insurance coverage) there are few occupations where you can sue the individual personally. When you take immunity away from those police officers, it puts them at huge financial risks. Let me explain this a better way:
I'm a CCW holder in my state. If I shoot and kill an attacker on the street or in a store, the police and detectives come out, and rule that me using deadly force was completely justified, they just hand my gun back to me and tell me they hope I have a better day. However........even though justified, the law still permits the family to sue me in civil court.
This is what we're talking about here. By removing qualified immunity from police officers, they face the same fate as I would if I shot my attacker or robber of the store I was in. And while they will likely not win against the officer, the legal costs can be financially devastating. If they did win, the officer could be paying that loss for the rest of his or her life.
So you tell me, would you ever do a job like that? I wouldn't and neither would you. Well........many other people won't either. This is how police departments will end up with the bottom of the barrel when it comes to applicants for a police position.
In other words if the Democrats were in power last year and removed qualified immunity, the officer in Chicago that shot the kid with the gun in the alley could face civil liability. Same holds true for the officer in my state that shot the 16 year old girl ready to plunge a knife in another teen.