All well & good, except how do you know until you've had it sat in your home working for × amount of time? The information is hardly easy to find, no box or advert for a TV says (except perhaps in very very small print) “will not work properly without an Internet connection”. Returning it is going to be a faf just physically, convincing the seller that the problem is a defect and not acceptable behaviour as designed is going to be fun too.

Things being too much hassle to fight is what a lot of the invasions of our privacy and other rights are based upon, hence 80-page click-through licences, difficult cancellation processes, labyrinthine stalking preference pop-overs on web sites/apps, etc.