If you have cancer and they say you have a year to live, and then tell you you have 375 days to live, it may be good news, but it really isn't much.
The climate MODELS try and predict what will happen if so many gigatons of CO2 are emitted over time, and the picture painted is pretty dire. And if we magically hit zero carbon TODAY, it would be pretty bad. At best the planet may limit carbon emissions to about where it is today, maybe. That simply is not nearly enough, IF the models are correct, or close.