The point about climate variability is a stock denialist talking point.

In reality climate predictions have been extremely accurate. There is absolute no mystery or ambiguity here. We've been improving our CO2 models for over a century now, and in recent decades the modelling has been extremely good - although if anything it's been too optimistic.

https://news.harvard.edu/gazette/story/2023/01/harvard-led-a...

The problem isn't the science, it's the politics. We have a planetary culture that puts profit and political ambition - naive uninformed personal indulgence and status seeking, mixed with sanctioned reality denial - over collective intelligence and awareness.

While we have individual intelligence - in varying degrees - we still have herd-animal politics and economics. Our management systems have barely changed for millennia, the same issues and tendencies to self-harm keep recurring, and they're completely unsuitable for dealing with the kinds of problems we're facing.

Darwin is remorseless. If a species is maladapted to its environment, extinction - cultural and eventually physical - beckons.

That's where we are now.