You've noticed that you don't need something, but you want them, so you buy them. For example, you don't need a pocket watch anymore, because you have cellphone displaying time, but you still buy a watch in the end, because it is so beautiful that you can't help buying it, you just want it, not need it. There are many such things. I think it is not strange, it can prove the quality of our lives has greatly increased. It is a good thing. We are not just satisfied with foods any longer, we need further pursuits.
But in the meantime, it can lead a great waste of materials, it may hurt our society. Nevertheless, we can't refuse it. We all want to meet our desires. It's not our fault, it's our human nature.