That and nothing more is the basic atheistic position.
Well, I'd say that it's safe to say that you aren't speaking for all people who consider themsNot the topic here.)es atheists.
To clarify, I don't think your bubblegum machine analogy fully captures the situation, and nor is it best to approach the situation by analogy.
That really depends on if you are talking about strong or weak atheists.
Rejecting the believe in god without evidence is enough to be the latter, without making a claim of it's own.
Doesn't mean you can't also be a strong atheist at the same time, but arguing for that position is futile because can't prove the non existance of a deity. (doesn't mean you can't disprove a specific god claim, but that is not the topic here.)