Look, I'm not saying there aren't reasons for it. Obviously the economic value of a TV is now low. If you're posting on HN, chances are you can afford a new TV in a day's work, which may be less overhead than storing a TV for when you or someone else might need it in the future. At the same time, this is a historical abnormality. A television is a miracle device made with extremely advanced, relatively speaking, technology. 50 years ago, it would have been insane to snub your nose at that. To you it's a disposable good, to an older generation there is no reason to view it as such (and, I'd argue, this cultural value of disposability that is being forged is extremely bad and not actually sustainable for our society long-term).
It isn't an artifact of modernity that people don't want stuff like that. And as for stuff that is an artifact of modernity, the generation entering their 80s today lived through the widespread adoption of color TV, the moon landings, the space shuttle, cable TV, mainframes, PCs, CDs, VHS, DVDs, the internet, cellphones, smartphones, and freaking microwaves, never mind all the advancements in autos. You'd think someone with that lived experience would understand that times change and their kids might not want all their old stuff for the same reason it's been sitting unused in their garage/basement for decades.
My diagnosis is it was boomers who wrote the script for "The Goonies", specifically the line "Goonies never say die!". They came up in an era where rampant consumerism was encouraged and even directly subsidized as a political policy, hell it was how we beat the commies! Hard to be a good consumer past a certain point if you're too aware of your own mortality.