You forgot to subtract the human suffering inflicted onto introverted personalities being forced to live in high-density urban housing as well as the cost of a much higher infectious disease transmission rate, increased crime (more humans in close proximity = more conflict), and/or higher cost of building materials suitable for high-density human living and spaces or the cost of human lives when the low-bid contract builds said housing and it collapses.

Seriously, every time I read a comment like this it's like Dr. Strangelove has walked off of Kubrick's set and into real life.