Jack of Harts

The frequency of habitable worlds in our area of space is far beyond what scientists ever projected.  Some people theorize some intelligent design process.  Our terraforming of Mars and Venus is as an example of that.  But we have yet to find any alien race with enough interest in our region of space to invest the time and effort it would take to terraform that many systems.  Is it random chance or did someone design things that way?  We still ask that question.