Kung Fu: I Ching not Chinese Boxing

In a recent post I told of finding a reference to "Kung Fu" where it could have been in relation to Chinese Boxing, i.e. Martial Art. I have since found that in philosophy it could represent/symbolize other aspects so when I went back to James Legge's translation of Hexagram 61 you find Kung Fu as follows:

 

One can interpret this statement, translation, to provide guidance as to the wholehearted practice of FA/MA where one of the results a combatant wishes to achieve is a freedom from the ego and all its trappings, maybe?