Think of it like this, death is unpreventable and we still live our lives. So even if the world collapse was totally unpreventable (I think we can still turn it around), it's still better to go down fighting and living life.
I’ll stick with the economic system that has reduced global poverty by 80% in the last century, and brought us everything from clean water to smartphones. Not the economic system that resulted in the genocide of millions, the systematic theft from the working class and which continues to oppress people under crushing dictatorships in places like Cuba and Venezuela.