Lmao your sauna is not clearing 100C, that's well past the point at which saunas can become hazardous to your health. If you genuinely run your sauna that hot then start looking into competitions because you're gonna blow all those professionals out of the water.

In International Sauna Championships the sauna was heated to 110°C. Source: https://en.wikipedia.org/wiki/World_Sauna_Championships?wprov=sfla1

Dry sauna at 100°C is not terribly hot feeling, but then again I don't like dry sauna. In those competitions the sauna was NOT dry, but water thrown onto the rocks every 30sec. That's actual hell to be in

Also, all you've done is list a bunch of understandings about Celsius that depend entirely on experience and prior knowledge.

Exactly. Because that is required to understand what the numbers mean. Congratulations for understanding what I said while completely missing the point

But I can say to someone unfamiliar with either system "Fahrenheit is a 0-100 scale of hot how it is outside" and they know almost everything they need to know about fahrenheit.

Fahrenheit is none of that. It requires prior knowledge and understanding where the scale lies. By your logic, 50°F should be perfectly nice ambient temperature, but in reality it's plenty cold enough for hypothermia