Have you ever lived in a country where people don’t have weapons? It is like night and day really - I never heard of a shooting in my neighborhood, and when Police shoots someone unarmed by accident, it is nationwide news (in a nation of 40M, I remember one situation happening a few years back).
edit: I found some stats for my country. Every year, for 40M population Poland: 125 uses of guns by Police (warning shots etc), around 25 times shot towards a person, 1-2 people killed.
I know for a fact that the police in Germany, Italy, Spain, and the Balkan countries is extremely shitty. You do not need an armed police in order for them to be violent.