True, but there must be SOMETHING of significance if it is of the Highest level of Classification.
When he said, consider the vastness of space, that tells me that he is alluding to Drake's equation of Intelligent life.
http://www.bbc.com/future/story/20120821-how-many-alien-worlds-exist
https://www.space.com/25219-drake-equation.html
IMO, it wouldn't be classified if they knew there were only a bunch of rocks and spores out there.