You miss the point of the discussion. The discussion is about how Fahrenheit relate to how humans interact with numbers and relate that number to temperature based on how that temperature feels.

I am not saying Celsius is arbirtray, I am saying that 40 being really hot is a weird number for most humans to associate with “hottest weather you are somewhat likely experience”. Of course if you grew up with Celsius it feels second nature. But for someone who isn’t familiar with either Celsius or Fahrenheit, the 0 - 100 could be way more intutive. Fahrenheit still fails at this because the numbers between 0-100 don’t really add up with what’s intuitive.

That’s why I said the original argument of “Fahrenheit is how humans feel” doesn’t work.

No, Celsius doesn’t make more sense in regard to how humans feel. It just feels more intuitive to us because we are used to the numbers. But if you try to explain the scala to someone the numbers feel entirely arbitrary with no real reason behind it. Why is 40 the really hot? 40 is such a weird number for humans.

0 being cold, 100 being hot makes sense, anyone can grasp that concept. But the inbetween steps of Fahrenheit make no sense. It isn’t intuitive, it only makes sense if you are used to them. A intuitive scala would be:

0 - cold, you need proper winter clothes 25 - chilly, you need a light jacket 50 - room temperature 75 - getting uncomfortably hot 100 - too hot, heatstroke is a real danger

It only makes sense if you grow up with Fahrenheit. Otherwise Fahrenheit isn’t how humans feels since most of us have no concept what these number mean.

If I would just go with 0 - cold 100 - hot I would assume 50 - perfect. But 50 is still chilly. 70-80 feels like it should be getting hot but that’s the most comfortable temperature.

A lot of users are also from poorer countries that lack the means to create their own web infrastructure. Using Facebook to run your business account is easier, cheaper, and more reliable than most alternatives there. Phone carriers and ISP often also have “free”-data for certain social media platforms. You get 1GB+1GB for Facebook/IG/YT/Some Game. So you are stuck in this loop where everything reinforces itself to use Facebook.

While my farts can also be trusted, the few times I doubted them I still went to the toilet just to be sure. It never turned out to be necessary but I’d rather take 20 seconds to go to the toilet and be safe than having to deal with the aftermath of a misjudgement.