Your point about Kelvin true, you still need to do some converting, but as I said, the day to day use ultimately depends if you were raised using either.

Using me as an example, I completely understand that 10~15C outside is freezing, 22~27 is okay, 30~36 is hot and 40+ is scalding.

You could make this same point about fahrenheit and both are true, I have no ideia what 100F feels like, or 10 or 40 or 160.