If there were werewolves in Las Vegas, don't you think a few things would have been noticed by now? For instance, heightened death tolls and animal-like maulings during full moons, a few eyewitness accounts, people who regularly and inexplicably black out every full moon, etc.
The
definition of a werewolf is simply someone who can turn into a wolf. Do they have to conform to your stereotypes of them?
Maybe they stay home with a dish of dogfood rather than going around drawing attention to themselves by mauling people. And why should they black out? Maybe they are fully conscious of being werewolves and are understandably discreet about it.
Not so for gods: god concepts vary so much that there is no consistent set of evidence like this that would cover the whole spectrum of god concepts.
Well, obviously when I talk about gods I'm talking about
my god concept. Suppose someone decides to worship my left leg as a god. I believe in the existence of my left leg, but that wouldn't make me a theist, because
I wouldn't classify my leg as a deity.
It is certainly possibly for there to be a lack of credible evidence for anything that I would consider to be a god if it existed. Indeed, this is the case. But even if it was not, my argument was directed at someone who was agnostic merely because one can't prove a negative; that there is no evidence for gods is taken as a premise for the sake of argument.