Given the timescales involved they'll be saying it for many more years and given the consensus amongst scientists the smart move is to work to correct.
The worst case is they where wrong and we improved the planet for nothing...oh no.
The worst case is they where wrong and we improved the planet for nothing...oh no.
The other problem is that "makes no difference at all" is a good outcome. A bad outcome is that we reduce carbon usage drastically, which reduces economic output drastically, which causes many deaths. (This is not hyperbole. Take China, for instance. They're polluting like crazy, but even with all the pollution, people are better off. They're moving to the cities to get out of rural poverty. That poverty shortens life spans more than the pollution does.)