You're taking the mean consensus prediction as gospel. There is a smaller but still very much possible chance of much more catastrophic consequences than that. It would be irresponsible for the IPCC to present only the most dire predictions, but I think it's also unwise for us to ignore them.
That is the scientific consensus of the IPCC, which is the official authority on climate change. And the scientific consensus is that the world is definitely not going to end, nor is it even going to come close. Listen to the science and the scientific consensus!