Really the question is how did she do that? If she had parents in the field (probably a common scenario), we don't need to know much more. If it's something else, then we can ask if those conditions can be generalized.
How do you know the question is intended to downplay her remarkable achievements? I first interpreted the question along the lines of Mozart or Tiger Woods and didn't think about it uncharitably until you brought it up.
I took the question as "thats impressive for someone this young, are her parents in related fields so shes been exposed to this stuff or is it all self guided?"
[1] https://wsspaper.com/65234/news/qa-with-science-talent-searc...
[2] https://dailyiowan.com/2020/11/18/iowa-city-west-senior-dasi...