[cameldrv]

Yes there are a lot of complicated second order effects from an increase in the average, but if you simply told people "We're looking at temperatures everywhere going up by 5.6 degrees on average, all the time", that sounds like a lot. 3 degrees doesn't sound like that much.

[gmuslera]

The problem is that you don't see the averages. What you see is that in some places for some days the temperature was 40°C over what they used to have in that time of the year (https://www.economist.com/graphic-detail/2022/03/24/parts-of...), the heat dome of 2021 should be a good warning (or warming) of the kind of extreme weather that 1.5°C could bring and increase frequency. Or the disruption of the polar vortex bringing extremely cold temperatures.

What you see in your normal everyday life is that things that you were used to are not that way anymore. And that there are some activities (like agriculture) that depend on some stability on weather. At least till we cross another threshold and things not seen in human history start to happen enough to be noticed, but by then it will be too late. What we need is to trust the measurements.