It is not necessarily shameful to admit you possesses insufficient knowledge to make a determination regarding whether god/s exist or not. For those who lack sufficient knowledge to make that determination, that is simply intellectual honesty. However, to believe that god/s do or do not exist in the absence of certain knowledge is belief without justification.
An atheist is someone who is without a belief that god/s exist, which is the default position from which we all start. An atheist might come to adopt the belief that god/s (any and all) do not exist, but an atheist does not necessarily believe in anything whatsoever. A lack of belief, one way or the other, does not equate with disbelief which is in fact a belief, that something is not.
The only logical approach to the question of a god's existence is to begin by acknowledging ones own ignorance regarding the issue and to not adopt a belief, either way, at the onset in lieu of certain knowledge. From this initial position of intellectual honesty, one can then ask, "What in reality is the term 'god' intended to refer to?" Then one has an idea of what their searching for and for which to make a determination of whether it correlates to or contradicts with what one knows to be real . . . once one understands the means and process for making such determinations.
Tell me what you mean by the term 'god' and I will tell you, not whether, but why I do or do not believe in or agree with your proposed meaning for the term.