That which improves your shooting skills to the point they become subconscious, conditioned responses is good.
You need to be able to run the gun from the subconscious so you can devote your attention to avoidance, evasion, threat identification, the force decision and driving the OODA cycle through it all.
Anything that conditions you to focus on matters irrelevant to an emergency, can get you killed.
“Nine-tenths of tactics are certain, and taught in books: but the irrational tenth is like the kingfisher flashing across the pool, and that is the test of generals. It can only be ensured by instinct, sharpened by thought practicing the stroke so often that at the crisis it is as natural as a reflex.” ~ T. E. Lawrence