I disagree. Atheists want to know the answers to life's big questions, too. I agree that it's fucking bizarre/amazing/sensational that SOMETHING created all of this out of nothing. In the same way that current scientific theory believes that this universe will eventually die of heat death... will life ever be created anew? Or that's it? Wild concepts beyond the scope of human comprehension, super cool ones at that.
But the fact that we don't know these answers doesn't suddenly make God or some higher power a thing. That's just the "God of the Gaps". Throughout human history we've always looked at things we couldn't explain with science as "God did it"... only to eventually be able to figure out what it is.
At the end of the day, atheism, by definition, is simply "disbelief or lack of belief in the existence of God or gods." To be a theist, you have to actively believe in God. If you DON'T actively believe in God, you are an atheist. I used to call myself an agnostic, but that was really just a copout... holding on to HOPE there is a God. I still want an afterlife. Total oblivion for eternity scares the shit out of me. But hiding behind "we can't know for sure" doesn't make a God or afterlife any more likely.