This hole is the reason/cause/explanation for the existence and causal dependence/inter-connectedness of everything. As far as I am aware, the atheist model has no comment on this. However, apparently you don't experience any hole. Tell me, how does your model cover this hole?

It's not that I, an atheist, don't experience such a hole. Far from it! I inhabit a gaping and mysterious void of ignorance. The difference is that while you see the outline of the hole and find something hole-shaped to fit into it (God), I am more interested in changing the dimensions of the hole. I don't want to explain why the hole exists, I want to destroy the hole altogether. The hole isn't a problem to be solved by the atheist model but by the scientific model.

A thousand years ago the hole was a lot bigger, and yet God was still perfectly hole-shaped. Consider that one day the hole may no longer exist, that the great and ineffable cause is finally exploded with a brilliant theory that describes the every underpinning of the universe and we all go "Ohhhh... that makes sense."

Whither then doth hole-shaped God go?

(B) Choosing atheism because it would provide some practical benefit.

If you want to maximize practical benefit, become a Christian. Or a Muslim, if you live in the Middle East. Or a superstitious atheist, if you live in China. Being an atheist, for myself, at least, is not about practical benefit. It's just that I don't have any rational way of believing anything else.