Fair play to ASV, in Seles's absence she seized her window opportunity with both hands and you cannot fault for that. She was an incredibly gutsy player, and a key component of the strongest clay court era in the history of women's tennis in the early 90s.
However it cannot be stressed just how badly Seles owned her before the stabbing (and that domination promptly continued when Seles returned). It's difficult to imagine her ever beating a non physically/emotionally wrecked Seles to win a major, let alone potentially having to beat Graf and Seles back to back to do so. Also it's very doubtful that she ever would have become world no. 1 without the stabbing.