Probably was a coincidence that Vargas made a huge leap in her performance immediately after her season in China . Anyway they just want to take her out of her comfort zone. Just this. It happened to Vargas and they believe that PROBABLY will happen again.
Terrible example. You can put Vargas anywhere and she'll thrive.
Also China = out of someone's comfort zone? completely unheard of. Even Samantha Bricio can look like Haak there only with more money and more free time