Shootall, there are real differences of opinion (and reality) between folks in some locales of the country, and other folks who deal with much different day-to-day possibilities (who are prepared oftimes to meet their own problems! I specifcally mean folks in the flyover states not in the "east.")
Regarding this thread and frequent discussion around here, many Americans in the western 3/4's of conus want something bigger than a .22 (only) to survive with, and something else available to them when 35-caliber/9mm is just too small to defend with!
Now if that bothers folks who like nice "cutesie little things" neatly wrapped in pleasant-looking packages .....? I and others have said (written) several times that .22 rimfires (in infinte forms, sizes, configurations) are GREAT for collecting food and some limited defense needs.
However sometimes there are a couple critters in the USA larger than bears that sometimes hurt man, but mostly any buffalo nowadays are found in private herds, and any moose likely to come into town are probably most numerous in Alaska! But neither of those two have claws and teeth that are constantly looking at everything they see as a potential next meal.
And every couple three years here in WA state, its not uncommon to have at least one or more elementary schools go into lock down during the day, when a bleck bear wanders onto a playground ..... Always gets in the news. If Yogi isn't so cute and cudely, when is a .22 going to stop him!? If Yogi and Bubu get beligerant!!?? No maulings have occurred in recent memories, if that will just continue!
Now, if someone lives around Jackson, WY or Gardner or Cook City, Montana, that "bear" might instead be a grizzly in the Rocky Mountain states, and be in its typically grounchy mood! (something that often weighs over 500 pounds) Is a .357 always big enough? Hence the catch-all 'bear guns.' Of course in that case a better tool than a .357 or .44 is a .45/70 or .30/06, but thats beyond this thread.