You don't think that you're being reductive?
Gotta think big, stories are puny both in terms of explanation load and their total existence in evolutionary time. They are fun over the dinner table but that’s about as definitive as they get.
Isn't that also true for "Sapolsky’s Behave and linger" and what you're currently believing? Why does it work different for other stories than the one you happen to believe in?