I am no expert in evolutionary psychology, but I think a healthy skepticism about it is understandable.
Ultimately, if you believe we are material beings, and that "mind" is a result of natural, material processes, yes, to think of mind in evolutionary terms makes sense.
However, I think that at this point, we do not have enough information about how cognitive processes work to make sweeping generalizations about the efffects of evolution on human behavior/cognition.
That is why COGNITIVE SCIENCE ROCKS!!!!!!!