If you look, that drive model is also the most highly used by far. I think it's just a matter of the larger sample size / use time.
I think drive age matters? I'm not clear if they cycle drives out at a certain age or just run them until they fail.
Also, if a drive is low enough in cost, then the additional cost of replacing an incremental 1% may be lower than the cost of acquisition of a more reliable drive.
The 12TB HGST are 220 days old on average. The Segate 12TB failure rates seem high, quite unfortunate as I own 6 of them.