It is fallacious reasoning to think that vast number of planets means there is a high likelihood that one of them contains life, when we have no idea what the likelihood is that abiogenesis might occur on a given planet. It is equally possible that life on Earth is unique.
I refuse to accept the view that mankind is so tragically bound to the starless midnight of racism and war that the bright daybreak of peace and brotherhood can never become a reality. - MLK
The chances of abiogensis taking place on a given planet may be one in a million, or it may be one in a quadrillion. We just don't know.
So it is highly unscientific and faulty reasoning to say, "Oh, there's a lot of planets, so it is highly likely some of them have life."
Fiddling While Rome Burns
Carthago Delenda Est
"I used to roll the dice; see the fear in my enemies' eyes... listen as the crowd would sing, 'now the old king is dead, Long Live the King.'.."