Consumer electronics is full of false/misleading claims.
What does a stupid UHF antenna has, that makes it "digital"?
When you see a "1000 Watts PMPO" sticker on a low-fi midi system, you can be sure it has at least... 5 Watts RMS.
FM tuners were FM tuners.
Then came the "digital" tuners. The other ones, were analog.
Then came DAB and oh wait... these are digital, the other ones were just digital tuning.
Then they announced the FM swith off... (oh wait, we need to buy DAB tuners...)
...and years later they switched off DAB (in April 2011, here in Portugal).
There can be several explanations for what you have described. One of the biggest problems is simple ignorance of technical details by the marketing team. Many, but not all, marketing staff and technical copy writters have little to no actual technical background. In such cases, the marketing communications effort honestly trips over industry buzz words, such as "digital", without realizing when the usage, or context of usage, is technically incorrect. This is especially true for consumer marketing, but much less so for B2B marketing.
Another problem is market expediency. By that I mean, the practical need to quickly capture a potential customer's attention, especially, non-technical consumers. An ad may have only seconds to gain the attention of a buyer, no matter how superior the actual product may in fact be. Conversely, many inferior products succeed precisely because the marketing effort was superior in grabbing the attention of buyers. The real problem here is the behavior of consumers, whom have busy lives, and far too many distractions demanding their attention. Where this usually goes wrong is, after having successfully grabbed the buyer's attentions, the represented benefits go clearly beyond what the product actually delivers.
Having provided a couple of innocent and common alternatives to dishonesty, there remain those marketing efforts which, indeed, do rely on intentionally misleading suggestions if not outright deception. This can be a slippery-slope of sorts, with gradations of offense. It takes great discipline for the marketing department to not lose it's footing regrading the slope of misleading suggestion. The FTC and consumer protection laws provide protections against outright lying. In the long term, products which do not meet the misleading suggestions of those companies offering them develop that reputation, and will come to be rejected by consumers, often never to be trusted again.
I think the important thing for engineers to keep in mind is that engineering, while a demanding discipline, is a concrete skill. There are exact or optimum answers to a given, well defined, problem. Marketing, on the other hand, in often non-concrete, dealing with issues of buyer psychology. The problems are often not well defined, and the variables too plentiful, and sometimes inscrutable. Much guess work is necessarily involved.
I've been in both the Engineering and the Marketing departments of a large technical product corporation. I know how engineers look down their noses at the marketing staff. I've found that walking a mile in the marketing person's shoes is often quite eye opening for the engineer. The reverse, unfortunately, usually cannot happen, as most marketing people don't have the formal training to walk a mile in the engineers shoes. Marketeers should keep that truth in mind. However, engineers should keep in mind that while they can usually perform the activities of a marketeer, it doesn't mean they can perform them well. Both functions have their role, both require certain skills and talents, and both are essential to a successful product.