The fight/flight reaction is not a conscious one as being discussed. It is one's subconscious and uncontrollable reaction to an immediate threat. It is not a decision. Custer made a DECISION to fight. Decisions like staying at sea vs going for an inlet with a storm approaching are the challenges of sailing. Aboard a boat, it's not fight/flight unless you look up and see a plane headed directly at you. In the case of being in a storm, it's panic vs action, confidence vs doubt, rational thinking vs foolhardiness, being prepared vs forgetting exactly how to deploy the para-anchor.
It's all about being able to think straight and make the right decisions.