Who is right though? I don't have a lot of faith in experts when it comes to edge cases, children who are capable of doing more than average. I mean, there are young children who can mountain climb, despite being "too dangerous" for even adults. But, she's been planning and preparing this for years, her parents have been also. Yes, she might not, but then again, she might be just fine. Or only go a few months and give up.
It could go horribly wrong and she could die. But guess what? Farm children who ride tractors could have a terrible accident and get killed by the tractor. Hell, I've been electrocuted when I helped my parents wire their house, and I've been doing that since I was ten. In comparison, Fluffy lost half her cheek has a child when she got electrocuted, but it it was a risk.
There are so many ways we can die being safe. And here is someone who thinks they can do something beyond normal, but you have so many more people saying "you can't do it, so don't even try."
You have to take risks in life and I don't think this is nearly as dangerous as say your average child. But, they aren't look at what she does now, I think they are looking at the average kid (or their own kid), knowing they can't do it.