I think we need to be open to all possibilities. There may be life on other planets and maybe even moons, it seems far more bewildering to think that we are the only planet amid goodness knows how many planets in the entire universe that has just the right conditions to harbour life.
But we don't have proof of it either so no matter how many times we say, "for sure there is life out there", we have no proof of it and until there is proof I can imagine, dream and speculate about what could be out there but nothing more. It is an amazing thought, that we are not alone but without some shred of evidence, I wouldn't say it's one way or the other.
We just have to hope
