Everyone gets to make their own risk assessment and decide what’s best for them. As long as you objectively look at your own circumstances and make an informed decision, then who cares?
The pesky thing about averages though, is that they’re averages. Let’s say there’s two defensive shootings. Incident one involves one attacker at about 3 yards, whereas incident two involves an attacker at 20 yards. First incident the defender fires 5 shots, second incident only one round is fired. The average of the distance of those two incidents is 11.5 yards with an average of rounds fired being 3 rounds. That data completely glosses over the unique conditions of both incidents and is a disservice to thoughtfully considering what kind of unique situation one could face in their own defensive shooting.
For me, I’m comfortable carrying a spare magazine because it costs me little to do so. Small real estate on my belt. I live not too far from Atlanta in between two decent sized cities and looking at how 2020 has been I know all it takes is one controversial OIS in my area for a circus full of goons advocating for “justice” to descend upon my locale and make life hell for those of us who might have to drive through theirriotprotest.