That a culture can survive the death of a much higher percentage of men than it can of women is not a "just-so" story.
It is a fact.
It is a fact.
There is an evolutionary reason for men to take more risks and have a desire to engage in hunting behaviours. We just have to be conscious of that and as per one of the top commenter's remarks not "fall" for something irrational or be driven by societal pressures.
http://journals.plos.org/plosone/article?id=10.1371/journal....
However, our societies are considerably more complex than that one fact; it's a mistake to use it to explain the fundamentals of everything our society does.
http://vancouversun.com/opinion/columnists/douglas-todd-mens...
https://www.google.com/search?q=risk+taking+and+testosterone...
"What on first inspection seemed like a sex difference was actually a difference between white males and everyone else."
http://nautil.us/issue/48/chaos/the-hidden-sexism-of-how-we-...
> Interestingly, a recent study conducted in the more socially egalitarian and gender-equal Sweden failed to find the “white male effect.” This national survey of nearly 1,500 households found that, all else being equal—and in stark contrast with the U.S. data—Swedish men and women had very similar perceptions of lifestyle, environmental, technological, health, and social risks