The flaw of atheism is not what the atheist chooses to believe about the existence of gods. It's choosing to believe it without evidence, reason, or purpose. Theism lacks evidence, but it at least can offer a positive purpose. And agnosticism lack evidence, but it at least can claim honest skepticism, with an open mind. But atheism can claim none of these. It fails at every criteria.
Of which none of these, have anything to do with science.
Atheism, theism and agnosticism are not science, PERIOD.
They are each a different position in theology, relating to the existence or nonexistence of any deity...so none of them are positions in science.
Science is a tool of acquiring knowledge through observations and experiments - hence the knowledge will -
(A) either be tested false and therefore the hypothesis is improbable and refuted,
(B) or be tested true and therefore have the probability of being verified and validated the hypothesis.
There is a third possible outcome or (C), where there are no evidences whatsoever, good or bad, hence “absence of evidences”. With the absence of evidences result, the hypothesis should be treated the same as false, therefore refuted and should be discarded, like point (A).
Creationism (including the Intelligent Design BS) frequently falls under the (C) category, and be branded as pseudoscience and should be treated as being no better than fables and fairytale.
Creationism, like theism, atheism and agnosticism, has nothing to do with science.,