The job of the police is to do a forensic review of the crime scene after you are dead.
As to staying alive—that is your job.
I truly hope that your statement is overflowing with sarcasm and you just didn’t acknowledge that.
As a member of law enforcement for over 15 years, I felt that it was my job to run to the sound of gunfire and help people, in times of crisis.
Not to do a forensic review of the crime scene after you’re dead. By your reasoning, there is no reason for any cops to have a gun, have emergency equipment on their vehicles, have handcuffs or any other non-lethal equipment on their belts. They are just supposed to show up, after the fact, and take some pictures.