There is a vast difference between life out there somewhere and life out there, that's intelligent, can travel in space, is close enough to visit, and can visit without being obvious about it.
Suppose there were 1 trillion intelligent civilizations spanning 2,000,000 light years wide civilizations in the observable universe right now. Observable universe has a radius of ed: ~78 billion light years. 4/3 pi * r ^3 = ~2 * 10 ^ 33 cubic light years. Where those 1 billion civilizations would cover 4/3 * pi * (2,000,000/2) ^3 * 1 trillion = 4.19 * 10 ^ 30 cubic light years. End result we would have (2e33/4.19e30) = less than 1% chance of being in the area of even one of them.
PS: Sure it's a silly example, but space is ridiculously huge. If assume there was 1 billion billion billion civilisations as advanced as us (as in radio at current power levels) and chances are we would not detect any of them.
Suppose there were 1 trillion intelligent civilizations spanning 2,000,000 light years wide civilizations in the observable universe right now. Observable universe has a radius of ed: ~78 billion light years. 4/3 pi * r ^3 = ~2 * 10 ^ 33 cubic light years. Where those 1 billion civilizations would cover 4/3 * pi * (2,000,000/2) ^3 * 1 trillion = 4.19 * 10 ^ 30 cubic light years. End result we would have (2e33/4.19e30) = less than 1% chance of being in the area of even one of them.
PS: Sure it's a silly example, but space is ridiculously huge. If assume there was 1 billion billion billion civilisations as advanced as us (as in radio at current power levels) and chances are we would not detect any of them.