Of course, but even the best case isn't great. If we can draw down a large amount of CO2, the best case can be significantly better.

The potential for serious positive feedbacks makes this even more important.

It'll be fine even at 3.0C. The IPCC report has scenarios up to 5.0C, and if you carefully read those and compare the population adversely affected to the overall population of the planet, you'll see that mankind will not end from climate change. Not even remotely.