I wouldn't mind so much if she was doing a good job elsewhere, but to swan in from her lengthy holidays and blatantly ignore the most important issue of our time is, at best, diabolical PR.
It takes a 16 year-old and a nonagenarian to shake authority awake.
In the House of Commons there is just one MP to represent consistently the arguments for urgent action and change in environmental policy. I think this is shameful, given the existential threat. The masses need to vote accordingly.
(On the other hand, protesters need to bear in mind that it is important to keep members of the public onside rather than risk alienating them. They must acknowledge when their point has successfully been made.)