I agree that atheism is strictly a narrow negation. As I recall, I was speaking loosely in this older article, generalizing about the positive philosophy that most atheists embrace (naturalism).

I address this question of atheism's scope at greater length in the first article linked below. I also argue that the rational methods that lead to athiesm also lead ironically to pantheism, in the second article below, which may or may not interest you.

https://medium.com/interfaith-now/do-atheists-have-or-lack-a-belief-in-god-ca7c674b9a5d?sk=1bb5b2b20b75eb4c367871eb57233794

https://medium.com/grim-tidings/the-one-religious-insight-that-science-and-philosophy-support-c0f213d329e5?sk=051002f23d15d3c8e98c91ddbb07809b