The first Terran cyber was born in 2205.  For the first twenty years after that, there weren’t very many of us.  We’re…particular about who we choose to work with.  And the Terran were suspicious, rightfully so with all the stories of rogue AIs taking over and killing everyone else.  That made it difficult for us to integrate.  There are still Terran who don’t like us, but those who grew up after Contact saw those of us who did live for what we are.  They welcomed us.