There is always the "it wasn't as bad as in Mad Max/Fallout/..." explanation. Nuclear winter is now understood to be either less severe than predicted back in the 60s, or nonexistent. Nuclear weapons will kill people and destroy cities, but if they aren't aimed at people or cities, but at military installations such as the US nuclear sponge[0], death toll and destruction will be far less severe. Things like the Golden Gate Bridge or the Eiffel Tower might be left standing, as seen in a few Star Trek episodes. Which would also mean that humanity would be in less of a severe turmoil than other nuclear war SciFi might have imagined.
[0] https://www.reddit.com/r/nuclearwar/comments/18e01zh/would_t... https://www.thomasnet.com/insights/nuclear-sponge/