I see both sides, no surprise there. I tend to think that Barry is right, in the sense that there is life out there, but the notion that the odds of life are tied to the number of planets doesn't really flow for me either.
Depending on what source you read, something like 100 billion people have ever lived on earth. "Water allergy", recognized as a legitimate condition, is only known to have affected something like 30 people. There's one diagnosis - "Field's Condition" - which literally has two diagnosed cases, the two Fields sisters who have it.
I guess it's a base assumption that you need a planet that can sustain whatever kind of life is "created" (there is no religious connotation there) but all the planet's in the world aren't going to help you unless you have all the building blocks in the right proportions, the catalytic conditions for them to form, whatever spark or trigger to start the reaction, and you need conditions to sustain suitably and for a long enough period of time to start an entire species.
Not arguing, just musing out loud.
I'm of the opinion that we generally can't handle information like "there are aliens among us". We can't even have civil discussions about the governments we live under, and the humans that live next door to us. Imagine the uproar if there's a Jawa living down the street (I'm not joking even a little bit).