I didn't say that a .22 could not be used as a survival gun, but I note you didn't have to use yours for that purpose. Could you have lived off the land in a foreign, hostile country, managed to escape the manhunt, and cover hundreds, perhaps thousands, of miles on foot to get to friendly territory?
If you could have done that, you are sure a better man than I am. I would probably have gone up to the first official-looking person I saw and put my hands up.
For that matter, handguns issued to pilots are more of a "peace of mind" thing than a real defensive gun. There probably have been a few cases where a downed airman did use his pistol or revolver to survive, but I suspect there were darned few.