If Human life was created by aliens then who created the aliens?

"Aliens did it" is a *beep* argument, it does nothing but push the origin elsewhere, not unlike the idea that early life on Earth came from alien bacteria. Well then where'd that bacteria originate from? If advanced aliens created humans (because of bilateral symmetry and our brain power? That's the alleged evidence?) It's easier, simpler, and more logical to cut out the middle man. Any other idea is unnecessarily complex, and without compelling evidence in favor of "aliens did it" or even the idea that our precambrian lifeforms were alien single celled organisms, those who accept these absurd positions are, to be blunt, pretty damn stupid.