True, good point. I still don't see their approach become successful because from what I gather it's just "raising awareness", I'd hope by 2023 people are aware of climate change. I really feel for the young activists who are a part of JSO because they are trying to do something to fix the situation and are met with so much hostility from the public. To me it does come across as a way to drain young socially aware people's time/energy away from useful actions and towards actions that won't have any outcome.
The best approach for climate action is through workers & unions organising, eg: https://youtu.be/J5Whs9IsTds
Good point about the inheritance. Actually I have seen it spread by communist from a "they are not left enough" perspective.