Every decently-made object, from a house to a lamp post to a bridge, spoon or egg cup, is not just a piece of 'stuff' but a physical embodiment of human energy, testimony to the magical ability of our species to take raw materials and turn them into things of use, value and beauty.
Sustainability is now a big baggy sack in which people throw all kinds of old ideas, hot air and dodgy activities in order to be able to greenwash their products and feel good.