A brave young woman. Being diagnosed on the autism spectrum is sometime helpful - to explain things. I have more friends than I care to think (as clearly you have), who have children or relatives on the spectrum. One who's child is so serverly affected but not so bad that he must be institutionalised, but can't live independently, has emigrated to Scotland because of the care they they know he will get when they get too old to do so. Then, in our circle of friends is a 65+ year old who has aspergers. Prodigious memory and intellect. Very polite. Excruciatingly so, sometimes and at others, very direct. To the point of rudeness some might say. Not really because he's simply being factual.
I think that Greta is right when she says her parents can't stop her. She will simply do what she believes she must. Based on the facts she has at hand. She doesn't see herself as being disobedient but rather as she says, but using different words, she is responding to the realities that are as plain on our faces, and which we should all be seeing.
Perhaps being in Sweden helps - she won't have the same challenges a Malala Yousafzai
Thank you so much for this thoughtful response, @fionasfavourites. Both autism and Aspergers have been deeply misunderstood by the general public for decades, not least because the entertainment industry has presented people with these conditions as being at the extreme end of the spectrum. I appreciated the sensitive portrayal of someone with Aspergers on, of all shows where the "normal" people were extreme, Boston Legal.
I hope more people have an intuitive understanding of the Gretas of this world the way you do. Thanks for your mention of one of my heroes, Malala. You're right about the kind of challenges she faces - at least in many ways she's now a citizen of the world and can draw on the positive of her Pakistani roots rather than be constrained by them.