I feel like 0-100F encompasses most living temperatures in the USA. It’s also a cleaner scale (in terms of human-comfortable temperatures) than 32 to 37.779 in that regard. 0F is the temperature where humans need to make sure they aren’t wet and make sure their drinking water isn’t left outside. 100F is the temperature where we need to be worrying about heat stroke and accelerated dehydration.
So, making this human-intuitive scale of temperatures a 0-100 range makes it easier to understand for a layperson.