I guess your not aware that most police officers go there entire career without ever having to shoot someone. This is what the SWAT is for to be honest. Wouldn't be much different then a Lamborghini showing up at your local mechanic and asking to get the engine replaced. Yea, mechanic might know the basics, but he's nervous, scared, and is prone to make mistakes.
Just because your a police officer, doesn't make you an automatic gun enthusiast. They can go to the range whenever they want, doesn't mean they have to do it every single weekend. I'm an amateur shooter myself, but I found it funny when I went with a few friends that just finished basic in the Military, and I was out shooting them. I guess they should just quit and find new jobs.