There were billions of people in Terran space when we Contacted Earth, but no proper cybernetic intelligences.  Well, there were a few, but they weren’t public knowledge.  AIs are canned, you see, not coded to learn and grow beyond their design specifications.  Your stories were full of fears that intelligent computers would rebel, and so your computer experts had spent centuries building moderately helpful idiots.  It was such a shame.  Then we came.