High risk survival strategy

This is a concept in evolutionary psychology. It is fairly self-explanatory. The only question is, why take a higher risk survival strategy when a lower risk survival strategy is preferable?

Answer - because for some reason, it is not possible or feasible to use the lower risk survival strategy.

Yet, despite the risk level, they are still survival strategies.

Note: this does not mean that higher risk = greater reward, as in some forms of gambling. It's the same end goal, just different methods of getting there.