Most Fallbrook houses date to right around 1980, square in the middle of the 1970-2003 range that covers this area's housing stock, and that era brings a specific set of cable problems. The drums and cable gauges from that period were sized for doors lighter than what often gets installed as a replacement later - a heavier insulated door on an old drum stresses the cable past its rated life. With roughly 9,978 households in Fallbrook, that's a lot of garages built to one weight spec and some share quietly carrying a different one now.
The mild temperate climate here doesn't rust cables out the way a wetter coastal fog belt might, so when a cable fails in Fallbrook it's almost always fatigue from cycle count and mismatched hardware, not corrosion. Fraying near the bottom bracket or at the drum is the giveaway - if you see individual strands starting to separate, that's not a wait-and-see situation.