Where are the aliens?

"Peering far beyond our solar system, NASA researchers have detected the basic chemistry for life in a second hot gas planet, advancing astronomers toward the goal of being able to characterize planets where life could exist. The planet is not habitable but it has the same chemistry that, if found around a rocky planet in the future, could indicate the presence of life."

If organic molecules are so prevalent where are all the intelligent space-faring aliens ?  The lack of evidence for aliens is strong evidence that we are alone, the random evolution of intelligent life is so rare that we are the only ones in the entire galaxy.  Note that this is not the same as saying "the random evolution of life is rare".  There probably are bacteria in most solar systems.