Isn’t this obviously wrong because of density? Suppose I own 1 unit in a 10 unit condo worth $100k. Then a few years later the condo is demolished and rebuilt

Isn’t this obviously wrong because of density? Suppose I own 1 unit in a 10 unit condo worth $100k. Then a few years later the condo is demolished and rebuilt as a 20 unit condo, of which I own 2 units. I sell them each for $100k, doubling my original price. This example ignore construction costs, but the point is density means you can have both ROI in real estate and affordable housing.