So is lung mostly an indulgence in distraction brought on by chi not flowing correctly in the body and causing emotional excitation issues and distractions?
No, not at all. It is a disfunction the element of air in the body.
Well what does it result in? I ask because Tsoknyi Rinpoche was excerpted recently and I read the entire question and answer series from the document that the excerpt came from and he says that Westerners have lung too high in the body and it needs to be brought down to just below the navel (the dan tien in Taoism/taiqi) and that as a result of lung Westerner's seem to be excitable and easily distracted but actually he's talking to people who already seem to know what the symptoms are so he doesn't go into that too much. He did the same thing in a video.
_________________Kirt's Tibetan Translation Notes
"Only you can make your mind beautiful."
HH Chetsang Rinpoche