But it’s a belief about epistemology, not a bunch of specific affirmations about the thousands of deities and mythical creatures that humans have proposed. The agnosticism/atheism dichotomy is pretty silly once you think in terms of epistemology, particularly if you believe in fallibilism or even philosophical skepticism.

Agnostic - I don't know if there's a God. Atheist - I don't think there's a God.

Is that wrong?

Only religious people care about distinctions between agnosticism and atheism.

Religious people can't even agree on what this God concept is supposed to be, but they can make fine distinctions in the ways people don't share their belief in it.