That's another case of mistaking viewer interpretation for actual fact. What Spock actually said in the movie was that only 10,000 people escaped from Vulcan itself. The line, like Gillian's "vessel" line, was ambiguous enough to allow for two interpretations, but the actual intent, confirmed by the screenwriters themselves, is that Spock was referring only to the survivors from the planet itself, not to the total number of Vulcans left in the universe.
This is why it's important to question your preconceptions. Part of the skill of comprehending a text is being able to distinguish between what's actually stated and what you're reading into it. As well as distinguishing between the more and less probable interpretations of an ambiguous statement. The more probable interpretation of Spock's statement is that he was referring only to those who escaped the planet itself;
Only if you ignore the "endangered species" part of the voice-over. The writers' intend doesn't amount to anything if it is contradicted by what's actually in the film.