I first heard the phrase “gross motor skill” in my first NRA class. The idea was that dropping the slide on a reload by racking it was a gross motor skill and therefore better to do under stress than the “fine motor skill” of hitting the slide release lever.
The instructor then proceeded to spend HOURS on the importance of a smooth trigger press to insure accurate hits on target.
So “gross motor skills” are good and should be done whenever possible, except when they can’t.
Why not ditch the idea that some physical movements are more “tactical” than others, and see the process of putting hits quickly on the target under stress as an integrated whole?