i mean a lot of measurements are arbitrary necause their manmade. thats creation of measurements in a nutshell. they exist to give people context to conpare to. time is a manmade construct, unit of length is a manmade construct. unit of weight is a manmade construct.

for instance with 1 kilo, tell me the last time a regular person had platinum-iridium ingot. its completely arbitrary.

Is there a difference between 19, 20, and 21 Celsius? It's also pretty subtle. Yes, there's a bigger difference than fahrenheit, but I've never cared regardless of scale down to what degree the temperature is. As a fahrenheit user, it's always 10s. 0-10, 10-20, etc.

Also when they describe their fahrenheit human scale it is "0 is really cold" and "100 is really hot", which are subjective and not very informative gauges of anything.

This is interesting but not really justified historically. Celsius predates the concept of absolute zero, and water is very important to our world, not just ourselves.

I mean you can do the same with a Fahrenheit thermometer, just check that it reaches 32. Most anyone used to that scale knows 32 is the magic number.

how do you calibrate a fahrenheit thermometer? With celsius it's hilariously trivial, if the thermometer says it's about 0 when you see water freeze, it's correct enough for everyday use.

You do the exact same but use 32 degrees instead of zero. I know celsius is cool and good but most people seem incapable of understanding how its just fucking marks on a line and any non-sciencey advantage is pretty much null.

You put a normal Celsius thermometer next to it and apply maths.