The difference is Larry Page's grandfather was at a union job in Michigan in the 1930s and sent his son to college, and then his grandson started Google. Textile workers in the Carolinas got less education, and then the factories closed up.
Look at Detroit: it had the highest wages in the US in 1950. Over the 1950s and 60s, the UAW Union took over the Big Three automakers, with membership peaking in 1979. Around the same time, the US auto industry cratered, and today, Detroit is a shell of its former self and effectively a failed city.
https://en.wikipedia.org/wiki/Brotherhood_of_Sleeping_Car_Po...
At most they end up in the "didn't work that long in a union job" bucket, not sure where you get the idea that these peoples experience is _excluded_