The issue is that we crossed those previous thresholds and ... the world kept improving? If you look at sites like Our World in Data then nearly all metrics of

The issue is that we crossed those previous thresholds and ... the world kept improving? If you look at sites like Our World in Data then nearly all metrics of human progress have dramatically improved over the past century, while temperatures increased 1°C. So it isn't clear that another degree increase will lead to catastrophe. The numbers are round and arbitrary. Our increased wealth and technology has improved lives far, far more than the increased temperature has diminished them, and I don't see why that trend won't continue.