Comment by pixl97
40,000 people live within a few miles of me. That isn't a city, that's a suburb or a town.
Also the leaving guns in vehicles thing could also be affected by another number here. And that is miles driven per capita and vehicles owned per household averages. That is you could have the same total number of thieves that steal guns, especially among those with more poverty, but as you increase the number of cars groups that could no longer afford them have them. Also the number of miles driven means the potential thieves are covering way more territory.
Anecdotally I heard about things like this in the late 80s and early 90s. Farmers were complaining that groups out of Chicago were running off with all the stuff they'd leave around all over the farm.
In addition starting in the mid 70s was a long recessionary period (stagflation) after decades of a good economy in the 60s that shook the US to the core.
I assure you there's quite the difference between a city (that even has “City” it its name!) of 80,000, and a town of 500. It's easy to see conflating the two as “high density population dweller ignorance” for anyone who has lived in or near all three (500, 80,000, 1M+).