You may not believe it, but the situation is very well documented and certainly a thing that is removing housing stock from cities around the world.
Housing has a value as an investment, and leaving the housing unoccupied reduces the cost to maintain the investment. Tenants have a lot of protections in many jurisdictions, and an owner is responsible for maintenance, depreciation and damages, while a tenant cannot be evicted by the landlord who wants to sell a unit without a substantial waiting period, if at all.