When it comes to baking, you need to strictly follow a recipe for the goods to turn out right. One forgotten ingredient or imprecise amount can royally screw things up.
So the way I look at it is that humans are just really, really advanced beings created out of some cosmic recipe.
Either there is an omnipotent chef at work to make sure all of the right ingredients were in the exact amount, at the exact time and at the exact conditions for us to develop the way we have, or we are one giant cluster-f%*k of a mistake.
I tend to go with the former, which is why I believe in God but not organized religion - a fundamental difference many lose sight of.