Thinking there isn't life somewhere else, if not many other places in the UNIVERSE, is sillier than thinking a 2000 year old zombie doesn't want us to masturbate.
I agree. But time is just as vast. The universe has been around for over 13 billion years. There has been intelligent life on earth for a fraction of that similarly small to how small the earth is in the universe. The improbability is that we'll ever encounter intelligent life.
I used to lay awake in bed as a kid debating the realities of the universe against religion, and it scared the shit out of me to the point that I would give myself stomach aches. No wonder my head is so fucked up as an adult. Kids shouldn't think like that.