I'm sure that's true for some families. But in others, the young people take a responsible attitude, and buy what they can afford when they can afford it. Just like we did
. My children took some of our old things that were in the loft (dining chairs, a coffee table and crockery - things like that), but as soon as they could afford their own things and had decided on a style they liked they replaced them. No debt, and no rubbish.
Yes, there are many people struggling these days, thanks to low wages and high house prices. But these people are not likely to live near the people who want to downsize, and who have the sort of furniture they think is valuable. Factor in the expense and hassle of going to see it to see if it will fit and whether it is what they are looking for, then organising transport to collect it and get it up the stairs/round a tight corner in the hallway etc, and a 'free' or cheap item suddenly costs more than its modern equivalent that comes flat packed, or will be delivered by someone trained to manoeuvre awkward house layouts. Plus the new item will make the young couple feel that the house has their stamp on it, not that of people a generation or two older.
I read an article a while ago about the mismatch between older peoples views of the value of their 'stuff' and the reality. In the past, we were encouraged to see purchases as investments, and to collect and acquire items that we thought would hold value because they were 'quality'. The truth is, though, that young people just don't want it, so there is no value. Capodemonte and Lladro ornaments, Sylvac pots, bone china dinner services, silver teapots and so on are all the sort of thing that many older people see as things to pass on to their children who should be grateful for them as they were costly. In fact, there is just no market, as young people don't want clutter. Many dealers refuse to take things like that, and also refuse to take furniture such as china cabinets, TV cabinets, and heavy old items. Maybe Biglouis can confirm whether the author was right?