I think it's definitely possible to overcome Confucius modesty and become expressive in performing arts. An immediate example would be the Japanese skaters: look at how much star quality there is - and this is a people who may be an even more reserved culturally than the Chinese as a whole. There have also been plenty of outstanding Chinese actors / actresses who are not afraid of the stage and are able to be expressive and perform. I think the problem with the Chinese skaters in the past was that they didn't yet see figure skating as a performing art form, but just merely a sport. The idea and need to express have never been drilled into them when it comes to skating. In the selection process (whatever it may be), they have not been encouraging "performance" so much as "athleticism".
But I think this is definitely changing.