Distance running fans are a fairly small, if passionate, segment of the population. There's, not a lot of casual sports fans who really care one way or the other about the track, especially something like the women's 10k. Thus, this may not define her legacy, because the that small passionate fanbase is fairly well-educated about the sport and all of its nuances. I bet they'll be able to see more in Huddle's legacy than a blown bronze medal at a World Championships (unless she completely tanks the rest of her career from here on out).
And, if it somehow does define legacy her among the hardcore (i.e., only) fans, then I guess she deserves it. Watching the replay, it's pretty idiotic. Though, I do feel sorry for her, as we've all done stupid things - just usually on much smaller stages with much less at stake.