If you don't need or even want a new house then what good does it do you or society to buy a new house? Consumption for the sake of consumption is not a good th

If you don't need or even want a new house then what good does it do you or society to buy a new house? Consumption for the sake of consumption is not a good thing. If you're buying houses solely as an investment then you get situations like Vancouver. How is that a good thing?