This piggybacks off the SWYNTS.
Traditional iron shooting requires meticulous head and eye alignment with the sights.
Dot shooting if parallax free allows more freedom in head position and use of peripheral vision and still keep muzzle on target.
This is something that @HCM has noticed with training shooters that dots excel in moving targets and movements. Likely due to additional freedom of alignment while still keeping muzzle on target.
When I shoot, I’m keenly aware of my muzzle index independent of my sight picture.
That’s why a press out rather than a casting draw. That’s why I train index independent of visual correction.
That’s why I notice a distinct difference when I change to a different gun with a different NPOA like a 1911 or Glock (and why I modified mine to match CZ / Sig angle).
In traditional teaching based off irons, I feel like iron sight alignment has usurped muzzle alignment… but iron sight alignment introduces additional constraints that muzzle alignment does not.
That is, you can have muzzle alignment without sight alignment.
Index is the basis of uncorrected vision shooting, but doesn’t get the attention and specific training that it deserves IMO.
This is the greatest source of plateau of efficiency and marksmanship in a dynamic setting (also IMO).
This came about in helping people make time at the 3 yard SWYNTS (0.8 draw, 0.2 split).
And a demonstration of base mechanics that vision and visual correction / refinement builds on.