I would not trust those Backblaze stats.. A quick inspection of blackblaze storage pods indicates an improper(vertical) mounting method.
This vertical configuration would likely cause a premature failure rate for drives that are designed for side or horizontal(preferred) mounting configurations.
Disk drives drive mounted in this particular vertical configuration places abnormal amounts of thermal and mechanical related stress (the entire mass of drive+internal movements) on the SATA Power and Data connections (a condition they were never rated for).
Note: You can probably get away with this type fixed mount configurations(SATA+Power) for 2.5" SATA drives since they have significantly reduced mass (20x less)) per drive. I've designed many different types of drive bays(SCSI, SAS, etc) and would never consider stressing connectors in this manor.
In summary, The observed failure rate may be more indicative of an improper storage array design, rather than the drives themselves, which may have faster seek times, resulting in increased dynamic forces stressing the SATA connections over time.