That seems like a kind of double-think. The race is important or it isn't; its meaningful to ban her or it isn't. If the race isn't that important, then 'banned for life' is a symbolic gesture only.
Other people are saying this in other ways in the thread, but the race is what someone makes of it. If what someone cares about is their place, and that's all that's important, I can see how what I wrote could be black and white. But for a lot of people, especially as the race distance gets longer unless one is on the podium one's place really doesn't matter for a race to be important, and it isn't worth caring much about whether someone is cheating.