It was purposely low a number to bring home the point of him being an endangered species. That there are less than 10,000 Vulcans living off-planet only shows the JJ-verse Vulcans are idiots.
But then so are we. We spend half a penny per tax dollar for everything NASA does yet we live in a time when nuclear, biological, and nano technology might have or may wipe us out not too long from now. Can we all agree on a $.02 tax-hike to quadruple our efforts off this rock?