Schewerpunkt, that is not entirely true.
I have several friends who recently graduated Ontario Police College and are members of the Toronto Police Service. They came through at different times, and all reported the same thing:
During recruit training, you spend a LOT of time on the range, both at OPC and afterwards. They do live fire training with Simunition in realistic situations that call for judgement and they do build up training on the range, starting with static targets, in good light, to moving targets in poor light, with/without cover, strong-hand, weak-hand, etc.
Even when I worked security, our lame one-day firearms course included scenarios involving dim light and shooting from behind cover, with the wrong hand, reloading from behind cover, etc. Unfortunately, moving targets could not be reproduced safely at the time.
I think you will find police recruits trained to a much higher standard of pistol marksmanship than the "old dogs" who got on when dinosaurs walked the earth and they were first issued a 6-shooter.
Now, annual requalification requires a minimal amount of effort, from what I hear, and it could be that due to a lack of available time to maintain skills, police officers gradually get worse over the course of their careers.