The service area sits in a cold, moderate climate band, and that matters for steel rollers specifically. Cold snaps shrink the steel rail slightly and the roller stem doesn't shrink at the same rate, so the roller binds at the top of the track on the coldest mornings - that's the squeal and catch a lot of Gibsonville owners hear in winter before anything actually breaks. Run it through enough freeze-thaw cycles and the bearing inside the roller wears out well before the wheel itself looks bad.
Gibsonville also runs a higher median household income than the wider service area - $105,981 against $79,585 - and in practice that shows up as more two-car, double-door garages getting daily use from two vehicles instead of one. More cycles per day means the roller bearing clocks more miles per year, plain and simple. A single-car garage door with one set of rollers can go a decade without complaint; a double door opening six or eight times a day wears out its bottom rollers first, usually inside seven or eight years.
So it's less about one dramatic cause and more about two ordinary ones stacking on top of each other - steel hardware from the original build, and a garage that gets used more than most.