Most of the housing stock in this service area went up between 1964 and 2012, with a lot of it clustered in the 1960s and 70s. Garage door cables on houses that age have usually been replaced once already, sometimes never - and original cable and drum hardware from that era wasn't built for the number of open-close cycles a door sees over 40-plus years.
Bradenton's climate is mild rather than harsh - no hard freeze-thaw cycling that snaps cables the way it does farther north - but that doesn't mean the cables are exempt from wear. Consistent humidity and salt-tinged coastal air work on galvanized cable coating slowly and steadily, and a cable that looks fine on the outside can be corroding under the coating for years before it frays. That's a quieter failure path than the sudden freeze-crack you'd see elsewhere, but it ends the same way - a snapped cable and a door that won't move.
Houses built later in that 1964-2012 range with newer opener systems tend to catch this earlier, because modern openers sense the extra drag of a fraying cable before it lets go. Original hardware doesn't give you that warning.