Great article. I agree with most of the author's points. I find doomers very annoying and problematic. Why even argue that position? Why try to convince people to join you wallowing in misery? I think they just want to confirm to themselves that nothing can be done so they can continue doing nothing.
One other question: It's hard to deny that this problem is hitting the West and Western influenced countries quite hard. What's it like in China? They're building for the future and talking about and working on tech that could help everyone. Are people in China largely optimistic?