The pods have internal redundancy, and your data is stored on more than one pod, so I'm okay with them using consumer hardware to back my data up. They also wouldn't be doing it if they weren't sure that the drives were reliable enough for that use.
That's one of my favorite uses of probability: if you know what you are doing, you can build extremely reliable systems out of unreliable components.
The OP's point was a confidence issue, and not necessarily that there was a better option that could have been taken.