It's a bit buried in the article, but I think that's one of his main points:
>Stripped of prospective cultural institutions, as well as of street life and housing, the plan soon turned into something akin to an old-school office park, destined to die at night — the last thing a young generation of New Yorkers wanted.
America has something of an obsession with single-use areas. Everyone lives in one zone. Commerce goes on in a different zone. Industry somewhere else. It's a big contributing factor in why a lot of places have ended up as dangerous wastelands at night; no one lives there, no one shops there, no shopkeepers keeping an eye on the street, no one out walking the dog or going out for coffee.
So when a new landmark building goes up on a piece of valuable real estate in Manhattan, it's a bit disappointing that the conversation ended up along the lines of "You know what'd be nice here?" "What, a coffee shop and a neighborhood grocery store?" "Nah, a giant bunker."
Not to say it's the worst thing ever, but we could have done so much better.