It has become commonplace, the idea that only men were hunters and only women were gatherers millions of years ago. Most importantly, the "fact" of unambiguous gender roles for those millions of years explains, by way of evolutionary psychology, all gendered behaviour today. (I have written about this before, from a different perspective.)
So first, we have the allegory of the thrift store gatherer. She (she has to be female according to the evolutionary psychology people) is driven by evolutionary imperatives to shop, to browse and select the best goods for the best price. She wanders through the store, looking for the best deals, much as she has been window-shopping for the best shops. She gathers her soon-to-be purchases, just as a female in Paleolithic times gathered nuts and berries, with a discerning eye for value.
Doesn't that sound nice? The good female shopper gathering goods according to her gendered, evolutionary role.
Sounds nice, as well. The hunter searching for prey, isolating it, and going in for the kill.
That's the trouble with so many of the assumptions of evolutionary psychology. We mostly don't really know the difference between an evolutionary imperative and a damn good story that simply illustrates the status quo, especially in matters of gender.