Maybe someday she will. First woman to compete in the Royal Rumble, eliminating a future World Champion both times. She entered the King of the Ring twice. First woman to win a men's title. She ran Jeff Jarrett out of the WWE (for that reason, Ahmed Johnson should also go in). She put Jericho over... think about that, somebody put Jericho over. She beat up Mr. McMahon in her debut match. She made Miss Kitty relevant. She talked Victoria/Tara into joining wrestling. And she definitely did not sleep her way to he top. Only mid-carders who were not in management at the time. Nobody beat her for the Women's Championship.
Also, she once beat up an old gay guy in a handicap match with her arse and boobs out.
If Chyna can't go in because of her porno past, then Sunny shouldn't be allowed to stay in because of her present.