The guards' attitude shows that the nature of combat prioritizes survival over fighting.
Inigo, Fezzik, and Westley attacked the castle in a frantic, frightening and dangerous way. The guards who were supposed to protect the castle fled in fear that they would lose their lives. This shows a side of human nature, in preserving life itself, regardless of anything else.
This question is about "The Princess Bride" and you can learn more about it at the link:
https://brainly.com/question/26262800