The absence of faith (atheism) does not require a proof/disproof.
I wonder about that. A committed Agnostic (if that isn't a contradiction in terms) will tell you that believing that there isn't a Deity is every bit as irrational as believing there is. In the absence of proof, 'faith' is required to make the assertion on either side.
Thomas T Huxley who is credited with inventing the term defined agnosticism as follows: "... it is wrong for a man to say he is certain of the objective truth of a proposition unless he can provide evidence which logically justifies that certainty. This is what agnosticism asserts and in my opinion, is all that is essential to agnosticism."
"... an agnostic is someone who not only is undecided concerning the existence of God, but who also thinks that the question of God’s existence is in principle unanswerable. We cannot know whether or not God exists, according to an agnostic, and should therefore neither believe nor disbelieve in him."