It most cases it is simply one of many factors the DA uses to allege that the shooter wanted to kill someone, they were untrained, walking around with chip on their shoulder, looking to prove what a great weekend warrior they are... etc.. Even in the cases where it was ultimately decided the police officer or individual was justified, the family ended up in financial ruin by the time the case was over.
This perception is what I was speaking too. It's the perception that Ayoob likes to pimp, but I doubt that it is backed up by fact.
I venture that the majority of lawful uses of firearms for self defense by lawful citizens, lawfully carrying, never result in a peep being said about their choice of trigger or other modification. Especially in Oklahoma with our current laws supporting the use of deadly force when justified.