Nothing particularly wrong with selecting the optimal choice based upon personal experience and anticipated need.
Experiential knowledge still deserves respect when it comes to different folks making their own informed decisions regarding what they believe will best serve their own purpose, in the circumstances they've learned to expect or reasonably anticipate.
There's seemingly no shortage of folks who still seem to think of
whatever weapon/caliber choice they may make as more or less being the equivalent of a talisman or charm against harm.
Like when even intelligent folks might carry a rabbit's foot or plastic-encased 4-leaf clover on their key chain, or in their pocket. It made them feel they might have a bit of luck on their side.
While there are still some anticipated circumstances (other than a whim

) that influence me to belt on one of my larger 9, .40 or .45 pistols, or even one of large revolvers, most of the time I'm not expecting that sort of "trouble" to come find me.
I'm no longer being sent (or planning caseload activity) that takes me into suspected or known dangerous situations every 15 or 30 minutes, or hourly, for a whole day or night shift. Trouble is going to have to work to come find me, and I've acquired a little bit of experience in recognizing the sort of situations where that might have a better chance of occurring.
If I'm wrong? Hey, it could happen, right?
Well, that's why I invested so much time in practicing to effectively run my snub revolvers, to the extent humanly possible, in the same sort of conditions I practiced and trained for with my larger personally-owned and duty weapons.
We learn to work with what we have,m and I spent my own fair share of years having to belt on and spend 8-18hrs a day with a
"full-size fighting handgun" (slight homage to an older expression from the late 60's.

).
I hardly ever gainsay the choice of someone else when it comes to off-duty and retired cop or private person CCW choices.
Now, if I
do happen to observe them using it on a training or practice range, and they don't seem capable of effectively
using whatever it is they've chosen,
and they ask me for an opinion? Hell, I might just tell them.
Bottom line, though, is that they're adults and fully capable of being responsible for living or dying by their own choices. Not really my business whether or not they decide to "choose wisely" or "choose poorly". Sometimes we can choose and do everything right and still find events stacked against us. Life in the real world.