I was wondering why one discussion wasn't enough, but after reading your opening statement, it makes perfect sense.
All my pistols have night sights. And I will explain why, again.
Having taken the Defensive Shooting Class and the CCW Protection Class at Valhalla Training Center, I was exposed to plenty of full, bright light conditions. I had no problem shooting in those conditions.
However, I was also exposed to very low light, foggy conditions, dimly lit, strobe light from a disco ball, complete darkness with only the pop up target being illuminated by my instructor with a flashlight, or by a side or backlight and long hallways with only a side light at the end.
In all of those scenarios, being able to align my weapon at various distance, at various heights, at different angles, was MUCH easier with my factory installed night sights. As a matter of fact, I rarely missed, and that was with multiple shots, even on multiple targets.
Where I found the night sights to be the most relevant to this discussion was in the low, or dimly lit scenarios I was confronted with.
A long "L" shaped hallway, with a pop-up at the elbow, and a light that was directed from the small leg towards the corner. When the target moved from cover, it was fully illuminated by the light, then when it was in "attack" position, it was only backlit by the light. Putting my green dot on the silhoutte that was 30 feet away made the rounds hit home without any extra thought.
In another scenario I was faced with, I had to escort my principle ( instructor ) thru a busy nightclub, with music, strobe lights, smoke and the diversions of mannequins all over the place. 2 targets were placed in the nightclub, at different distances, and the lighting made it that one second you would be in colored light, the next you would be in darkness as the disco ball revolved and moved. I never had a problem picking up the front site and aligning in conjunction with the distance to the threat.
Now, I have been shooting a long time, and I have always had night sights on my weapons. I also have 20/15 vision in both eyes, so my vision is perfect. I am lucky. What works for me, may not work for you.
But, I firmly believe that if you train with the weapon, you should know the weapon.
NGIB trains a different way than I have been trained. What works for him, might not work for me, and vice-versa. You need to make a decision as to what will work for YOU and then you need to train that way so that you get dead on perfect with your weapon.
Any other advice is just plain ridiculous....
I have never understood the reason for ADJUSTABLE pistol sights on a factory pistol, in a factory caliber however. I have never had to adjust one pistol site until I converted a 1911 to my .460 Rowland project. And even that was one click....