Yes we live according to our faith that the sun will rise in the morning and so on, but we are talking about fundamental questions such as what drives change in the universe.
Your argument sounds good and rational, but some atheists can also come up with good and rational explanations without the need to worry about the source of evolution or consciousness.
I don’t see any great need to worry about such things for more than the time to have a chat over a coffee, because as you say, as we are incapable of imagining the real situation.
In the end it becomes a case of individual viewpoints and our faith that we are right!.
