Paper shooting and metal plate shooting that are stationary targets are a different scenario from a life or death scenario. Many times the target is moving. You could be moving. Shooting at the range is a lot different from the stress of taking someone's life and the legal consequences behind it when the bad guy has the capability of taking your life too.
Some of my training involved running prior and sometimes even wrestling prior. Think your shooting will be accurate after that? Nice to have a stationary paper or metal targets as you put your electronic dot on the target. Congrats, you hit your target. In real stress they found many shooters never aligned their sights keeping their eyes on the threat. That is a real mistake but that's reality sometimes when you're in a real fight.
Many top shelf police department train with simunition dye bullets. They put you in something like a school or a mall with a real gun with dye projectiles. You don't know who the bad guy or guys are with all the chaos of the actors. Many have run toward the gun fire to find out in a pause of shooting the "bad" guy ran past them with the victims to get shot in the back.
Another great training tool is shoot don't shoot police video type training game. I guarantee you will not be 100% correct in your seconds decisions to shoot.
It's easy to come to assumptions how great you would do under stress.
Training under stress and fatigue is a must. Even as a civilian we do it. But you the only way to get good at gun fighting is to fight with guns. Force on force, scenario based training with simunitions, CQB, VCQB, should be a must and should be ongoing throughout their careers.
Even with simunitions, need to know what it’s like to get shot and shot at. Keeping with the basics (should be reinforced at every range day regardless of skill) marksmanship, moving and shooting even at a target on the range should be part of the training curriculum at the beginning of every training session. Again, even as a civilian I do force on force and scenario based training 2-4x a month.