Where exactly in my post did you see me write that iron sights are unnecessary or undesirable?
I'm also not sure why you put the word index in quotes followed by magically?
Is the concept of an index something foreign to you and do you believe it works "magically"?
This is a quick explanation of what an index is from Ben Stoeger who is one of the top 5 best IPSC/USPSA shooters in the world.
The video confirms my understanding of what you (and apparently some others) mean by "index."
I find it hard to believe that achieving a proper index will always happen with all postures and varying number of hands controlling
the weapon. Depending on what other sighting equipment one has on one's weapon, a dot-equipped pistol may give no indication of
how to improve the aiming of the pistol when necessary, which may be less than what happens with stand-alone iron sights.
I have seen this with myself and one other person, with the same pistol. What have you seen?