Michael Vassar has been known to say that humans are not 'corrupted' by heuristics and biases and other elements of modern psychology. Humans just are psychology.
Robert Kurzban puts this rather eloquently in his new book:
Michelangelo is famously quoted as saying, "I saw the angel in the marble and carved until I set him free." Some economists are, in some sense, like this. They start with theories in which agents - people - have some idealized, rational mind minus the stuff that economists carve away - thus we see terms like 'biases', 'heuristics', and 'irrationality'. They document departures from (supposed) perfection - rationality - much as a sculptor chips away marble, hoping that when they are done, human nature is left, like Michelangelo's angel.
I see no reason at all to proceed this way, as though human psychology is perfection minus shortcomings. My view, the modular view is more like clay than marble. Like sculptors who add bits of clay, one after another, until the product is done, natural selection added - and changed - different bits, giving rise to the final product. We'll get done with psychology not by chiseling away at human shortcomings, but by building up a catalog of human capacities working together - or in opposition - in various contexts.