I don't. Many media outlets have used her as a figurehead while doing so, but that's not the same thing. They could have used someone else, anyone else, but the novelty of an adolescent being given messiah status and treated as a world leader but without any responsibility and being allowed to throw tantrums and berate everyone (including people who are actually doing anything relevant) is a gift for the media. She hasn't done anything to bring "huge awareness" herself. She's not even any good at public speaking. This forum has a higher standard of public speaking than she does.
There are many people who've done more for environmental issues than she has, many of whom are amongst the people she's berating for being the wrong age. She has little understanding of the subject and offers no solutions to any part of any of the problems. Her biggest use is her age and sex, which people can use as a weapon against anyone who doesn't beatify her and give her credit for all the work done by other people (see this thread for dozens of examples).
You contradict yourself.
Yes, the media could have used somebody else, but they didn’t. She’s been given enormous coverage on the back of it, and I don’t see how you can say that with that hasn’t come huge awareness, as the issues have been widely reported alongside reports of her.
He age, adolescence, inexperience, lack of knowledge can all be criticised if you choose - but what cannot be denied is her actions - rightly or wrongly - have brought enormous coverage and attention to the subject of climate change and environmental concerns.