... because the police always meet armed bandits with whom they need to fight. And they need to initially react correctly. Every policeman is afraid of being late with the reaction. Therefore, he does not all act automatically. All accidents happen Just by chance.
1) It is a myth that police work in the United States is dangerous. There are housing projects where it is 100 times more dangerous to be a resident than to be a police officer in the worst city. Being poor and/or homeless is dangerous, being a cop is not. Truck drivers have higher mortality than cops in the U.S.
2) In many U.S. cities police avoid areas with crime and react very slowly when sent to a crime, so they don't get hurt. Chicago is famous for being one of the most violent U.S. cities at the moment. Virtually every job category in Chicago is dangerous. If you are a barber you run the risk of being shot. If you are a cabbie you run the risk of being shot. If you are a bank teller you run the risk of being shot. There is only one job category in Chicago that has had zero fatalities in the last 5 years. Police officer. The last fatality on the Chicago Police department was December 2011. It is the safest job in that city and police officers run away whenever there is any danger at all.