1) A large subset of people possess instincts that were successful for reproduction in the ancestral environment, but are no longer so. See also plummeting birth rates despite being at the historical peak in terms of access to resources for the average person (in the developed world, at least).

2) Some people's evolved instincts are to play a long game based on building reputation and then leveraging that reputation over the long term, rather than pursuing immediate wants and desires. Such an instinct will produce a lot of behavior that seems out of line with a naive interpretation of how we "should" be evolved to behave.