Gao Yi's self-confidence was built through battle, having evolved from cautious and prudent to increasingly overconfident. You could say he was getting carried away, but you could also say that he had developed the demeanor and temperament of a true expert.
Being arrogant is actually not a pejorative when it comes to experts, because to become a top-notch master, one indeed needs that kind of supreme self-belief.
However, it also has its side effects, which includes being arrogant and isolated.
He had politely turned down Marina, ignored Emily, and even upon seeing Lucy again, Gao Yi still lacked the kind of joy that should exist between men and women.
Why?
Because the thing about Kung Fu is that it's bloody addictive.
Especially for those who practice Inner Boxing, it truly leads to a state of desirelessness in the end.
"You all know what has happened. In general, I've chosen to leave this place of conflict."