There are many reasons for this... In the UK ordinary police don't carry firearms, this naturally reduces number of people shot :)
But there are many things that could be improved by changing training, guidelines and accountability.
In Denmark it's a use-of-force to draw a weapon or even more your hand into position to draw (or even signaling the ability to do so). Such events have to be counted, and officers held accountable.
In the US police often draw or move hand into position as routine procedure on a traffic stop.
You are right, it can't be fixed purely through police training and policies, but you could make inroads.
But there are many things that could be improved by changing training, guidelines and accountability.
In Denmark it's a use-of-force to draw a weapon or even more your hand into position to draw (or even signaling the ability to do so). Such events have to be counted, and officers held accountable.
In the US police often draw or move hand into position as routine procedure on a traffic stop.
You are right, it can't be fixed purely through police training and policies, but you could make inroads.