Whoever is currently alive won't live to see the absolute worse that earth is going to be in upcoming centuries, if the human civilization even survives until then

I try not to succumb to this attitude. Humans are remarkably able to build systems and technology to solve complex problems. The fact that we aren't making the needed changes now fast enough doesn't rule out that we might as it becomes more apparently necessary, or that some new plan will emerge which helps dramatically.

But we also cannot get complacent thinking that it's future generations problem. We need a breakthrough yesterday.