It's not that they always lie, but that the expectation of the end user of a certain piece of hardware vastly differs from what the manufacturer states how you

It's not that they always lie, but that the expectation of the end user of a certain piece of hardware vastly differs from what the manufacturer states how you should treat it and guarantuees. Most end users expect a disk to work flawlessly at any given moment no matter what they throw at it. Same with all other hardware indeed, like printers for instance.