I think if you put that statement in context, bin Taleb is saying that such "black swan" events can't be understood in the absence of a suitable behavioral model for the economy -- and furthermore, you don't want to rely on any global behavior models because they ultimately prove limiting. Communism anyone?

There is a lot going on in finance every day that simply cannot be objectively modeled or understood in scientific terms. That's a problem, but we also need to accept that there may not be a globally valid solution. Viewing complexity as the enemy sounds like as good an approach as any.