Nobody is arguing that Yifan is better than the peak time of porgal. But it does not mean that Porgal can win Yifan in a big time tournament. If Porgal never tried, how do you know she can win the champion for sure? If you are her fan, feel free to YY that she can easily win the champ; she had never crowned one just because she never tried. Honestly, I do not know, even though I believe her games are better than current Yifan's. In the big tournament, I am not sure whether she will lose herself when she plays against a woman player. Until she won a woman world champ, I am not convinced. Maybe she is too scared to even try. The fact is that Yifan won the woman world champ, but Porgal has not. Feel free to YY that Porgal can win the champ easily, if this makes you happy.
BTW, 王跃' rating was within top 10 for a while (I am not sure about his current rating). Even 王跃 lost badly against Porgal, it does not mean Porgal got the title of woman world champ. Period!