His comment was made in an article about the crazed frenzy of people fighting to get one of his guns, and the widespread belief that the .32 silvertip was a highly effective combat load. He was remarking on a number of things, including his decisions to leave off sights,for reasons of simplicity, weight, and to avoid hangups on the draw. He was actually surprised at how it had been embraced.
The question, I believe, still comes back to one point. If a .380 can be found that is just as reliable, just as small, far more powerful and capable of far more damage, what reason is there for using a .32?
Using the decision of the masses is generally a bad idea; I believe that the masses are incapable of making good decisions on their own and they listen to what they are told by the authorities. The masses even buy microwave pancakes! In this case, the masses have embraced the 9 mm bore pistol to the point that it's even the standard round of NATO, and the .380,in principle, was the standard of the commie nations.
Choose whichever you want, but there are lots of reasons to avoid .32.one of the most important of these reasons, imo, is that you need to use up a lot of ammo training with a pocket pistol, and .380 is easier to find and significantly cheaper.