The question always is if we can even do something about the climate now or if we should spend the energy and resources into preparing for a potentially inevitable future.
Humans have always been champions of handling change. Why should this be different?
It's usually easier to stop doing something than to deal with the consequences of doing something.
> Humans have always been champions of handling change. Why should this be different?
Humans have never faced this kind of change. It will be different because it's not just a different temperatures, it's the collapse of the ecosystem which we rely on for food.
Can you point to any time during the existence of our species with a similar kind of change?
> and it's collapse of whole ecosystem.
That's mostly based on scientific studies, existing examples of rapid changes in ecosystems, and previous mass extinction events. Do you have any evidence counter to this idea?
You didn't ask for "evidence for my worlds".