JD made an assumption that GT is like him or any other celebrity and is therefore fair game and dishonestly (imo) selected those clips of reporters and their questions to make the point and smear her.
The reporters questions were, on balance, quite good e.g. 'why do we have dozens of private jets at this event' and 'how did you get here' etc.
She has not been properly trained to handle these off the cuff questions and has been probably coached (by her dad I believe) not to say anything.
It would be ideal if those same questions were put to her in a controlled environment i.e. in a prepared interview. At the end of the day, climate change and it's effects/implications is a very complicated issue.
From some bits I clocked she is now questioning capitalism. It would be good to see where she is going with that although I don't expect to see miracles.