That's not necessarily true. You could have a shy god. The better your epistemology gets, the shyer it gets, always staying on the edge of humanity's epistemology. But it still works miracles when people aren't looking too closely.

Though I'm not quite sure what kind of god you're talking about in your comment; it seems weird to me to ignore the only kind of god that seems particularly likely, i.e. a simulator god/pantheon.