Yes, one accomplishes more with a kind word and a long gun, than with a kind word alone.
For most of my career, a shotgun was the only long gun I authorized to carry. Then for a time, 2002 to about 2004 or 2005, I was certified to carry a patrol rifle, but could only deploy it during narrowly-specified circumstances; otherwise, it had to stay cased, in the trunk, whereas the shotgun has always been deployable at our discretion, and carried in the passenger compartment, if we wished. (For the British Empire folks, trunk = boot.) I sold that Colt Govt Carbine to a colleague with younger eyes.
About 2013 or 2014, an old academy classmate, who worked in our "Fusion" center, persuaded me to start carrying a patrol rifle again. I checked with the firearms training folks, and learned that the athletic, timed qual had been made a bit kinder and gentler, for those of us with bad knees. I bought a complete BCM Lightweight Middy* upper, to mount on my M&P15 lower. At sight-in time, however, I learned I needed to finally start wearing prescription eyeglasses, and the completion of that process put me perilously close to the end of a series of mandated refresher classes. Then, two minor injuries conspired to cause me to have to cancel the refresher, so I will have to start fresh, which means managing to schedule, and attend, one of the all-too-rare forty-hour certification classes.
So, I am still relegated to shotgun and handgun, but working night shift patrol, where/when we usually fight at very close range, a shotgun is a quite relevant long gun. Plus, I am one of the very few on my shift trained to breach doors with a shotgun, and probably the only one to actually still bring a shotgun to work.
As DB indicated in the video'-ed interview, the shotgun is also better for opponents who are in and around vehicles. Brenneke or Federal Truball Penetrator slugs with perform more reliably against auto body components than the PD-mandated 55-grain JSP fired from an AR15.
Now, if only my chief will OK Aimpoints on our shotguns, all will be right with the world. Aimpoints are OK on patrol rifles. The new-for-2017 Aimpoint that clamps directly to a vent rib would be nice; I have a 21" vent rib barrel for my M2, or could cut-down a beat-up 28" barrel to 18-ish.
*The BCM upper is now on a BCM lower, for a complete BCM Lightweight Middy rifle.