Consider this (and this related thread) from the genes' point of view. It may be worth having all of your carriers do risky things, if the few that die of them are more than made up for by the ones who survive and learn something from the experience (such as how to kill big fierce animals without dying).

For a gene, there's nothing reckless about having your carriers act recklessly at a stage in their lives when their reproductive survival depends on learning how to do dangerous things.