The .22 rifle doesn't have a role in home defense, but in the context of prepper and surviving it definitely has a role. It's one of, if not the most popular gun and round. Ammo will be plentiful and is cheap to accumulate. Very useful for varmint killing and hunting. The ammo could also be used for barter.
I disagree with that. Can you imagine 5 people with 4 25 round mags shooting out of 10-22. 500 rounds in about 60 seconds. Kids and women in SHTF scenario. While long range fire and battle rifles attack from othe angles in a home/area protection plan. Just a thought.
Normal defense - kill lots of possum and raccoon in the chicken coop with the .22lr. Chickens don’t complain about caliber.