You're right the world isn't going to end. But the water shortages, refugee criseses that make anything we've ever seen look like nothing, losing significant amounts of coastline, and much more frequent much more extreme weather sure as fuck is going to reduce quality of life significantly.
If facing the reality we're in causes you to go "oh well I give up", that's a you problem. Acknowledging that were in for a real tough time if people don't start taking this seriously isn't the problem, the fact that people aren't taking it seriously is.