99% of the people in that office had absolutely nothing to do with the decision that upper management made. They are just working for a living. They didn’t choose anything, they chose to not starve. Fuck off with punishing the entire work force for the greed of a few individuals.
Chances are enterprise drives will last far longer than 5 years easily in my experience, but in my opinion 15% off isn’t enough to justify not having a warranty. I see those sales often enough on legitimate drives.
Enterprise drive sales aren’t restricted in anyway, you just need to buy them from a reputable seller. I personally would avoid Amazon, there are tons of “deals” like the one you found on there and they don’t make it obvious. A legitimate seller example - https://www.connection.com/product/seagate-8tb-exos-7e10-sata-6gb-s-512e-4kn-fastformat-3.5-internal-hard-drive/st8000nm017b/41308811?cac=Result