"This device certified not to compromise your privacy" could be a good selling point for a printer, especially if half of the printers have it and half don't.
Of course it won't help when you are shopping and looking around in a store for some reason.
So, yeah, it is good advice if the outcome is important to you and you dont know a better way to protect yourself from accidentally buying something like that. Unless you know a better way and are holding out on everyone?
For printers, I also recommend pricing out five years of supplies. I bought a printer that cost 5x as much as one with similar specs, but ends up costing less in supplies.
Not everything is measured in dollars, and getting back the dollars spent as a result of deceitful advertising does not undo the damage caused by the deceit.
At the end of the day it's a team of psychologists, computer scientists, and super computers against one human. It's not a fair fight. There are plenty of dark patterns to make you not internalize the tracking. So while you're technically right, no one expects to see this happen in practice because your model isn't accounting for this.
In some cases, it does. In medical trials, you need "informed consent", and not just regular consent. It doesn't matter what papers are signed, if a patient isn't informed what the trial is testing, what known side effects there are, and what alternatives there are, it doesn't count.
More relevant to this issue, GDPR also uses the concept of informed consent. Under GDPR, tracking is legal only if consent is informed and freely given. The example printer fails both these conditions. It is not informed consent, because the tracking is not prominently disclosed to the user, and merely mentioning it in the fine print is insufficiently prominent. It is not freely-given consent, because a service being conditional on acceptance of tracking means that there is coercion to accept the tracking.
My viewpoint on the ethics tends to follow somewhat close to the GDPR's requirements. Even if somebody clicked through a 50-page EULA, that does not give informed permission to track somebody, and so it is still spying.
There should be a labelling standard for this where the manufacturer must disclose if any registration is required to operate the device to its full potential, if any app or special software is needed other than a system driver, if any phone-home data is being sent, and what data is actually sent, when and why.
"Buyer beware" but most of the time you have no idea what the experience will be like. It's usually not disclosed on the box, reviews rarely mention it and I'd like to have a sure way of being informed before I make my purchase.
It's a similar thing with software, software and apps that require registration for no other reason than add you to their marketing list, but it's particularly egregious with physical items.