The article doesn't say that the coughing fit was caused by her fighting off the Japanese film crews. The article does say that the coughing and tears took place in the small, hot interview space, which, judging by the sequence of events described, took place some time *after* she refused the Japanese interviews. And somehow I doubt it was only Japanese film crews who were forcing her to sit through long long interviews - in fact, the article says "various TV outlets". In case you haven't noticed, there are film crews from many countries at most international skating events, and most of them (not just the Japanese) are fairly aggressive because they need to get footage for their broadcasts.
You may believe that Japanese TV crews have a long and nasty history of harassing skaters to the point where the skaters can't perform, and that may be the case, but this particular example does nothing to prove that point.