No you aren’t an incredible athlete if you withdraw at the first adversity. That is the most basic rule of being an athlete and sports. She is a failure. Furthermore she stole the spot that rightfully belonged to someone else who didn’t get to go to Tokyo and wouldn’t have taken the cowards way out.
If this was a white girl she would be universally reviled.
I don't believe that. But, if a white athlete were reviled for dropping out, I'd have the same question: Why is everyone so upset?
Then again, I'm not a sports fan, and not even the Olympics are interesting to me these days.