That is utter nonsense.
The whole "well the average gunfight is 2.5 feet away and over in 3.3 rounds" is about as much nonsense as well.
I say this as someone who has been in multiple shootings. Yet somehow I have never been in an "average" fight...
Just limiting this to stateside, and not during the war, where getting shot at while defending our regional embassy outposts could be and literally was at one location a bi weekly occurrence.
Anyways, I have been shot at distances where I could almost touch the guy, and then at a distance of over 100 yards.
And to ones who always "but, but, but" because they want to put things into nice neat little packages, and parameters. Bullets don't care. Bullets don't care if you define something as "offensive or defensive". Or of a person who is shooting at you is wearing a desert tan uniform, or the colors of a local gang member, or just the regular clothes of a pissed off knucklehead. It makes no difference.
Conflict is conflict and battle is battle. When people are trying to kill you, you don't stop and say "wait, is this an offensive shooting and are you 6.5 feet away?", is this a police shooting, or a civilian shooting, because a gunfight between two men is somehow different if someone is wearing blue polyester! I can just walk away if I am a citizen! (NO, No you cannot. Predators do not let people just "walk away"..) I need to change guns and tactics and define things differently. Timeout!
I need a gun with rifling, and I need to aim. Wait!
The REALITY is that EVERY shooting is a precision shooting event. It does not matter of you are in a meeting hall in a village in Iraq, or a grocery store isle or parking lot in Iowa. You are responsible for your rounds, and you have to make precise hits. Or there are consequences.
I have carried a J Frame for more than 25 years loaded with wadcutters, and practiced with those wadcutters out to 50 yards. The J Frame is generally a BUG to my primary, but I treat it as a precision weapon and train with it as such.
I have learned exactly where the sights hit at different yardages, as shown here:
And here are two groups at 50 yards. The blue dots were my first group.
The point is that I have never, not once been issued a crystal ball to tell me that in 10 minutes that I was going to be in a gunfight, how many people would be involved or if there would be hostages. So I train and practice as if my life and the lives of the people I care about depend on it because they do and they have.
In spite of what the theorists think, you won't get the fight you WANT.
You will get the fight that you GET.
It won't be in your favor. You just have to deal with it. How well you deal with it will depend on how long you and possibly others will live.
There is your reality check for the day.