I think we are asking the wrong question Atomant. We should broaden the thread title to be: Because the Bible is wrong doesn't mean a deity (EDIT: a higher being) doesn't exist.
We have a mountain load of evidence that humans existed before Adam and Eve. A six-year old can see the evidence that there never was a global flood. The bible is flat out wrong. That doesn't mean however, that some disinterested, powerful alien life form didn't start the ball rolling in our universe by pouring in a few cells in a warm limestone vent. Perhaps this planet was like an ant farm that was watched by a distant alien race for their amusement.
When I look at an empty space in a yard I want to fill it with flowers, greenery and I want it to be brimming with life and colors. Maybe some creature passing by the planet felt the same way?