For decades, the New York City Housing Authority tried to keep up its buildings without help from the private sector. It was like using paper cups to bail out the Titanic. Even when NYCHA started enlisting developers to fix properties early in the de Blasio administration and ramped up those efforts under Mayor Eric Adams, it couldn’t make progress fast enough. The numbers are mind-boggling. In 2011, NYCHA developments needed $29.2 billion worth of work. By 2017, the number had ballooned to...