Balderdash...😉 You wouldn't believe how much less things would cost without the hidden inflationary cost of litigation lawyers attached to almost everything we buy. Companies just pass it right along to us. Lawyers get millions of dollars, while the "class" they fraudulently (usually) claim to represent get dollars and pennies. The process goes like this: lawyers sue company for 'whatever,' company resists, lawyers agree to "settle" for an amount they believe is less than a continued court venue would be, and the company--never admitting a wrong--agrees to the settlement just to save money on the continued litigation. It is, in truth, a racket.
If companies were always selling "defective" products, who would be buying those defective products? Very few, and said company would quickly go broke and right out of business. Lawyers here exist as leeches sucking blood from the customer-manufacturer relationship. We pay for the leeches who do this, but we don't have to like it or approve it. As I mentioned, SMR drives cost less than CMR drives, run just as fast, and bear the same replacement warranties. The only thing they won't do that CMR drives do is striping for RAID. So if you don't do RAID, an SMR drive will serve you as well as a CMR drive and will cost less.
While there is no doubt that the manufacturers were wrong not to mention this in their SMR drive literature at first, it wasn't the lawyers that got them to change their minds--it was the angst of their customers that forced them to be upfront about their CMR and SMR drives.
Through the years, I have found the hard drive manufacturers exceptionally easy to work with and more than willing to replace failed drives and other things. The correct procedure is not to sue them, that's stupid, actually, if you are not a lawyer hoping to make a quick buck, but to contact the hard drive manufacturers if you are disappointed in a drive they sold you. I've never known them not to do more than I've asked for in the very few times I've had to contact them over a failed drive in the last few decades. I can count those failures on fewer fingers than I have on one hand, but every one of them was a CMR drive...😉