By putting the word "post-" in front of something, it makes the author sound smart. That's why they do it.
Personally I don't really see the problem. If you want to argue for a different state of things after some event, "post" seem like the correct word. Just like you would say "post war period". You might of course think that the statement itself is pretentious. But at least they argue their case, i.e the importance of her actions, in the article.
anyway, I just saw on the news that the serial-assaulter resigned, or has decided to take a travis (a leave of absence followed by a resignation), so that's a good thing.