The thing is, once again, that there are some things for which most people cannot reasonably expect to acquire "experience."
Getting into shootouts with handguns is one of those things. Most infantrymen, should they end up in a battle, will use a rifle (or heavy weapon); few will use a pistol; and most infantrymen do not end up in a battle.
Most cops will never fire their gun in the line of duty, outside of training.
And a lot of people who do fire their gun in self-defense, or LE work, won't do it a second time - so it's difficult to say what difference their initial experience made, compared to any effects their training may have had.
In other endeavors, training can trump experience. Flying is a good example. A lot of pilots amass a lot of time flying the line, but don't train for emergencies all that often. They are often very smooth at flying the plane in normal conditions, but may not be as good at handling emergencies in the aircraft as a pilot whose training more intensively and extensively focused on in-flight emergencies.
The more experienced pilot will probably have smoother landings and a better touch on the controls than the pilot with less experience, but more emergency training.
The guy who put in lots of hours and repetitions of training for engine failures or fires during takeoff will probably do better with the emergency in that environment.