Need? Not really for his short barreled self defence scenario, which is his narrow argument. But have the option of, why not. Not every choice needs it, I love the Centennial and Bodyguard snub revolvers, the old hump back bodyguard not the new so called Bodyguards. They are excellant choices in .38 special.
But nothing wrong with options either. Choosing say the model 60 in either its short, 2.13, or long, 3 in, variations gives you options. I love the .38 special FBI load, great loading. But, in very cold Michigan winters, I like the peace of mind the added punch of a .357 magnum gives also. Chances are the .38 will do fine, but.... of course chances are i won't need either and i still carry, i like my options. I also prefer. 357 magnums in my revolver when I am wandering the woods, especially the Northern woods.
Nothing wrong with options.