Child prodigies can be through abuse, but also through sheer skill. (A friend has a son who is a wonderful guitarist, and all through badgering them to buy one, and then practicing without being told. he now has a scholarship...)

My experiences of Korea is that smiling unnecessarily is not good manners by many customs, (it shows self pride,) so I do't think you can tell her level of enjoyment through her expression.

Many kids are pushed, some rebel later, some don't. Perhaps the least we can do is appreciate the rather extraordinary skill on view in the clip.

Thanks for sharing it.