I think this is a theory of mind issue. You are used to Fahrenheit intuition and living in the US, so people arguing against your perception seem to be bikeshed

I think this is a theory of mind issue. You are used to Fahrenheit intuition and living in the US, so people arguing against your perception seem to be bikeshedding or being willfully obtuse/superior. I can perhaps relate my subjective experience to better explain what's going on. I grew up with Celsius temperatures, so temperatures like 27C or -5C tell me exactly what I should wear when going outside. For Fahrenheit, even though we are told that it maps to human experience, I have to consciously try to remember what these 10F, 20F temperatures mean and often forget. The intuition just isn't there at all. For height, I'm used to the metric system, but I can also understand the imperial system in that specific area because of seeing so many discussions about it over the years. I actually learned to cook while in an Imperial zone, and now I am more used to certain temperatures in F. The reason people find it shocking, is that we are essentially forced to deal against our will with Imperial measurements, because the US is a powerful country. The annoyance has more to do with the sensation of being trapped by another culture and having to adapt to their way of life rather than the reverse.