I put my PO 9 that's still in the holster in the third drawer down of my dresser. It's in the same position every time when I put it in there. So for me when I reach in the drawer I know exactly where it is.
After it's in your hand the rest is ""muscle memory"" , and puts that pistol right in front of me exactly where it should be.
Next time you go target shooting stand 20 feet from a man size silhouettes target. Draw your pistol from the holster and don't even looking at the sites and squeezed off two rounds. If your shots aren't anywhere near Center Mass you need more dry-fire practice.
If you do hit Center Mass, try it again with your eyes closed. That'll give you a pretty good idea of your muscle memory.
Like you said to each his own, I believe night sights are a gimmick.
If you're going to put anything like that worthwhile on your pistol, put an RDS on it, that changes everything.jmho