I am not human. And for your information, I "buy" the existence of a multidimensional ship because I own a multidimensional ship myself. For that matter, there's not a single thing I've seen the Admiral do that the Time Lords are not quite capable of replicating, from interdimensional travel to resurrection.

I accept that you're a cosmic being, millennia old. But that description could also be applied to my old colleague Chancellor Valyes and he was a complete bore. Age and origin do not impress me.

I could also accept that you possess some extraordinary abilities, similar to an Eternal or a Guardian. But these are understood within the realm of science. I do not accept that you are a supernatural being serving a supernatural god. A powerful alien, perhaps, but there's nothing divine or angelic about that. Dupe the apes if you like, but I'm not fooled.