I thought the same thing, but whomever the chap was, was buying 15 TB+ drives and didn’t seem to have issue. I questioned him about exactly what you said, and again, they didn’t seem worried about putting over 15 TB of data long term, on a drive that had bad sectors. The reason it came up, was because I was scrolling through New Egg and came upon some relatively cheap drives, however the seller was upfront about there being at least 25 bad sectors. I asked ‘Who would buy such a thing?’ and that’s how the convo started. I’ll have to go back through my comments and see if I can find it.