I formulated this last fall, and wrote in a paper notebook. I googled it, and it's unsaid, at least in this form. So I declare authorship of this aphorism at least for now.
"The reason we should not believe in god isn't because there is no god, but because believing in god distracts us from what's important in life."
Here is another quip written nearby in the same paper notebook, that appears original to my own formulation to the best of my ability to research it.
"It hardly matters at all where I end up. Just being there is what's interesting."