Actually, it isn't a giving up, as you say, but a thing to say when someone tells you what you believe in is BS or nonsense. I can't debate someone who totally dismisses my opinion like that. It would end up in kind of a stale mate.
I am not dismissing your beliefs but stating your chose them. If you debate that you debate that you had no free will to choose your beliefs and you might be right...
So then... Logically... why do you feel you had no choice? What makes you think that your personal belief in god is not a choice?
Atheists typically do not present the same argument. Normally they say things like I disagree that the bible proves god. Or There is not enough evidence to support a belief in god....
Or... What I think is misconstrued... Its not a choice that an atheist makes when he or she chooses not to believe in god no more then it is a choice he makes when he or she chooses not to believe in unicorns.
Its is still in fact a choice... The evidence considered and weighed led to that choice and the expression is that the evidence for god is no more then the evidence for unicorns but the expression does not imply the atheist did not choose.
So often I see the theist argument that a belief in god is not in fact a choice... Always I am led to how do people conclude this? Its not rational or logical and there are explanations behind the statements but if someone actually says.... my belief in god is not a choice.... why do they say it? What is the reasoning and how did they end up at this seemingly, to me, logical impasse?