It's vanishingly unlikely that a bug would affect all their drives (across all recent models, and only after burn-in) simultaneously, unless the drives are managed by a remote server with a SPOF.
How many years between incidents are you talking, and when was the last time a manufacturer had a multigenerational bug? (and is quality improving, or decreasing? That is, are we more or less likely to see failures in the next 10 years than we did in the last 10?)
Disk failures could also be triggered by datacenter environmental factors shared among many drives like temperature or noise.