If I go to a spa, I am not breathing in 60°C steam. It means that even if the ambient temperature is above sixty degrees, at least the steam won't be 60°C anymore when it lands in your lungs, as it will cool down while traveling there.

Basic physics. In the land of saunas (Finland) it is easy to learn that you can't directly inhale the air, as it will burn your lungs. Instead you must use your hands as a barrier when breathing, to cool down the air before it touches your insides.

You've must understand, that the temperature that destroys the virus, will also destroy healthy tissue.