Ah, I see. Though, it's still useful that the relevant range isn't 0-100 but can go below zero since it's a significant change in weather conditions when we're below freezing point, but I get your point.
In the end, it's probably what one is used to. Temperatures here are typically between -20'C and +30'C.
Whereas in C, 0 is fine and 100 means you died 50 degrees ago.
However, C is much more useful in industry, where boiling and freezing points are more important.