Spare US your pretense at knowing what life in the US is like.
Statistically speaking, most law enforcement officers, local and federal, will most likely go through their careers drawing their weapons at the range, not in the streets. The only areas where those odds increases are in the ghettos where gangs already made their establishments, and even then, if an officer, uniformed or plainclothes, have to draw his/her weapon, not likely he/she will ever shoot at anyone. If the police have to engage anyone deemed 'armed and dangerous', they will engage with overwhelming numbers and that is %99.999 of the time enough to deter any criminal in his/her rational mind to submit and the entire event will pass without a single shot fired by either side.
I am not saying that criminals do not resist and gunfights do not happen. What I am saying is that you, and others like you, make the mistake of seeing rare events in the news to be the norm.
So please spare US your made up 'history' about US.