It's the mention of sapient, or intelligent life, that is missing from the article, as Bill mentions. It is unlikely that anything humans will do that will remotely give us the capability of finding and initiating a first contact with intelligent life. It's also quite possible that no other species with intelligence is capable of interstellar travel, and no one will be contacting us. The biggest drawback to branching out into space and other planets is a lack of a cohesive and inclusive plan involving all the peoples of the earth. Without that, governments are duplicating each other's efforts and wasting money. At the end of the day, we are all earthlings and we have but one home, and we shouldn't lose sight of that through our diversity and squabbles. That's loosely the way I see it.