I think I agree with you, but it's worth playing the devil's advocate to understand this view more. How do we know these vacant units are net-negative in socie

I think I agree with you, but it's worth playing the devil's advocate to understand this view more. How do we know these vacant units are net-negative in societal impact? They take up space and are mostly unused, which is a societal drain. But, the owners pay taxes and use few local resources, which seems like a societal gain. We could play with the numbers so that they're obviously a societal drain, just assume they've found a way to pay $1 in taxes after creative accounting. We could also assume the opposite, that they're paying for the education and transportation for dozens of city dwellers. So how do we quantify and balance the costs and benefits?