It's absolutely the case that everything we are, evolved. But there's a certain gap between the hypothetical healthy field of evolutionary psychology and the one we actually have.
This sort of thing is why people make fun of ev psych. That's the 2008 study that claimed to find biological reasons for girls to like pink.
Of course, one bad study doesn't condemn a field - "peer reviewed" does not mean "settled science", it means "not-obviously-wrong request for comment." But this isn't a lone, outlier, rogue study - this shit's gathered 46 citations. (Compare citation averages for other fields.) (Edit: No, not all of the cites are positive.)
As it happens, we have full documentation that "girls=pink" dates back to the ... 1940s.
This sort of thing is why people make fun of ev psych. That's the 2008 study that claimed to find biological reasons for girls to like pink.
I think it deserves more fairness. The abstract only claims to have measured a "cross-cultural sex difference in color preference", making no claims about the sex difference's origin. They do speculate a bit about ev-psych in the body of the paper, but they begin this speculation with the words "We speculate" and then in the conclusion they say "Yet while these differences may be innate, the...
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.