Why do atheists deny that they are just biorobots?

[Neo-Scholastic]

So in your mind atheism is something to which you reason, not something from which you reason.

That's what we've been trying to tell you. Atheism isn't a worldview. It's the result of an epistemological stance.

Here's what confuses me. I have exactly the same epidemiological stance, apply reason to experience, and yet I reach a different conclusion, i.e. God exists. Why then, is my belief in God a worldview and your opposite conclusion not one? Moreover, having reached that conclusion I can carry that over as the premise of further inquiry. Why are atheists incapable of doing the same?