This part of Illinois sits in a cold, moderate climate band, which means steel roller stems and bearings go through a real freeze-thaw cycle every winter. Moisture gets into the bearing, freezes, expands, and that's what turns a quiet roller into a grinding one faster than it would in a milder climate.
Pair that with the age of the housing stock across the service area - built mostly between 1958 and 2004, with a heavy concentration of 1980s and 90s construction - and you get a lot of original garage hardware that's been through thirty or more of those freeze-thaw cycles without ever being touched. Builders in that era weren't speccing sealed-bearing rollers as a default, so a lot of these doors are still running the steel rollers they shipped with.
With roughly 112,206 owner-occupied houses in the area, that's a large base of garages built in the same two-decade window, aging through the same winters, on the same basic hardware. It's not a coincidence that roller failures cluster this way - it's the housing stock and the climate working on the same parts at the same rate, year after year.