Good advice and worth repeating. My dad (Army Weapons Specialist) taught me the same. 'Bring the sights to target, take half a breath, squeeze the trigger.'
I think many LEO misses are due to the constant message of 'draw, fire, keep firing until the threat is stopped.'
I think that message works as long as you have superior numbers, but what happens when the ammo runs out?
Better advice might be to simply, 'make every shot count'.
While your are doing your one eye Annie Oakley aiming the bad guy just pumped out 5 rounds in your general direction. No thanks.
You should practice both well aimed shots and combat shooting. Both are necessary skills.
dad taught me to hold my breath. I read somewhere to take a breath and let it slowly out as you squeeze the trigger...that works best for me...