There's no shortage of people who are on the "we're doomed, there's no point to even trying" train. If you try to point out any improvements (e.g., US per capita emissions drop), they won't just say it's not enough—they'll deny it's even possible that it's true.
I want people to believe in climate change, and to be concerned about climate change, but also not be petrified into inaction about climate change. Many, many people are on the wrong side of the fear level.
I don't see how that would make people's anxiety unnecessary. I'm in the "of course it is man made, what are you talking about" camp, but let's assume it's not man made for now, but climate change is real.
Wouldn't that be even more anxiety inducing? If it is man made presumably with the right incentives and changes we can unmake it. If it is not man made, then what? We just lost out on the cosmic lottery, it was good while it lasted? How is that less anxiety inducing?
At this point catastrophic climate change is almost certain. The only question is whether it's just a mass extinction or whether it crosses a tipping point and creates a runaway greenhouse effect.
Climate scientists are not relaxed about this. They are running around in terror desperately trying to warn people. And - so far - getting shouted down by the polluter lobbies.