It's all about changing the goalposts. We have probably lost the war against 1.5 deg C climate change, as even if we were to freeze emissions now, I believe we would hit that (need fact check on that). We are currently losing the war against 2 deg C climate change. The next war is against 3 or 4 deg C climate change. All of these milestones have severe consequences more significant than the last, so all are worth fighting.