This is not a fair argument. Why should you assume that condos is the 'correct' thing for this land and factory is the 'wrong' thing? Isn't that for the market to decide? What if I told you someone was offering to buy the property to replace it with an orphanage, would you say this woman is denying poor, helpless children a place of refuge?
Isn't this woman exercising her property rights in a perfectly fair way within the market economy that we have, in exactly the same way that so many developers have exercised their rights to tear down X and replace it with Y, where many people might have preferred to keep X?