Humanity will likely survive climate change.
I like your optimism, but I don't share it. We honestly don't know, one way or the other. What we do know is that human extinction in on the table and growing in probability. When I look at human actions as our cumulative knowlegde of these risks grew, well, I'm not exactly confident our species will make it.
I'm aware. I'm well informed. I don't think there is anything new anyone could say that could terrify me any more than I already am. Now it's just the creeping and leaping realization that our fears were correct as events prove worse than our models predicted.