See, i still disagree with this completely. On some level you are correct, as we can generalize everything. If you take Suzie who bought a Glock for home defense and has kept it in a drawer by her bed for the past 5 years then yes, you are right. However if you take someone who is a hunter/sportsman/enthusiast that shoots once or twice a month and has maybe taken a training class they would be much more prepared than your "average" cop. Your statement about firearms training not being the most important factor is both right and wrong. Actual firearm manipulation is a much smaller part of proper firearms training than what non gun people think. Even something as simple as most states CCW class requirements focus so much more on safety and threat identification. Look at the 4 basic rules of gun safety as defined by the great Jeff Cooper.
1.All guns are always loaded.
2.Never let the muzzle cover anything you are not willing to destroy.
3.Keep your finger off the trigger until your sights are on the target.
4.Be sure of your target and what is beyond it.
These are the basics that every gun enthusiast goes by.