I think the lack of parallel in other countries is partly explained by the lack of civil defense spending and nuclear/natural disaster preparedness funding. I read in a nuclear survival manual that the Soviets and Eastern Europe outspent the USA on civil defense (i.e. public bunkers and shelters) by several orders of a magnitude. The Soviets prioritized the survival of people, and the US nuclear preparedness strategy relied on creating a private industry that preyed on paranoia and fear as their major selling point, regardless of the fact that there is a real basis for shelters and bunkers, it makes much more sense for it to be public. The investment in civil defense came in handy for people in Ukraine and Donbas, who had bomb shelters all over the place that were often turned into restaurants etc. If a war came to the the US, the public would largely be fucked, just like they are during a natural disaster, save for a few paranoid, well off people, or people who happened to live near a public building that may or may not still have a working shelter in its basement. You can still see some signage for nuclear shelters in US cities, but they are generally housed in courthouses, government buildings, or other public, but relatively inaccessible places.