Very well, I could have phrased it in a better way. Let me try again; and let’s hope I am not mistaken.
Considering that even if there is such a thing as an objective probability, it can be shown that such information is impossible to acquire (impossible to falsify); how could it be anything but religion to believe in such a thing?
“Anger exists in Homo sapiens because angry ancestors had more kids. There’s no other way it could have gotten there.”
This is not entirely true—as Boris seems to have noticed. More generally; anything that purely helps survival is certainly more probable to propagate through a species. However, there are other traits that might propagate, such as any of those that are either: a) Not useful nor a burden b) A negative biproduct of something useful, without outweighing the useful