You're just saying this because you're American and accustomed to it.
To you, a 0-100 scale makes sense but to me it doesn't because 0f (-17c) is way rarer of a temp than 100f (38c).
Anyway, from the metric perspective, most people look at it like... 0 is coat and boots weather, + 10 degrees is jacket weather, + 10 degrees is t-shirt weather, and + 10 degrees is hot. IMO, using "freezing" as the reference kinda makes sense...
It should be noted here that the daily high for a good 1/3-1/2 of America is below 0C/32F/freezing for a good 3-5 months each year. Our weather varies much more significantly than most (not all) of Europe. Even with Fahrenheit, it is not uncommon for places like Detroit to be sub-zero for days without getting into positive temperatures.
I've personally lived in Marquette, Michigan and now live in Phoenix, Arizona and have experience both -40F(-40C) and 118F(47.7C). To me, the 0 = really cold, 25 = cold, 50 = mild, 75 = comfortable, 100 = really hot scale makes sense having lived through those extremes. But you're right, that's largely because it's what I grew up with. And with that in mind, it is extremely unlikely America would ever transition away from it for that very reason.
Both 0F and 100F happen regularly in many parts of the US and I would not say here one is rarer than the other. NYC has seen both in the last 12 months.
To you, a 0-100 scale makes sense but to me it doesn't because 0f (-17c) is way rarer of a temp than 100f (38c).
Anyway, from the metric perspective, most people look at it like... 0 is coat and boots weather, + 10 degrees is jacket weather, + 10 degrees is t-shirt weather, and + 10 degrees is hot. IMO, using "freezing" as the reference kinda makes sense...