Back when I used to hang around over at talk.origins, one of the scientist/atheists there seemed to think that the sheer size of the universe was the best argument against the theist idea of a universe created for man. He thought it absurd that a dramatic production starring H. sapiens would have such a large budget for stage decoration and backdrops when it begins with such a small budget for costumes - at least in the first act.

Your apparent argument is that a big universe is evidence that Someone has big plans for us. The outstanding merit of your suggestion, to my mind, is that his argument and your anti-argument, if brought into contact, will mutually annihilate leaving nothing but a puff of smoke.