If the tea is not poured with boiling water, it will not boil (or will be boiled for a very long time).
If the tea does not cool - you will burn your whole throat (yes, I know, there are fans to drink the tea at the temperature of boiling water, but, first, it is very harmful, and secondly, I personally do not get any pleasure from drinking it)
and...
I will uncover a terrible secret - you can pour a cup of boiling water. Wait until it is boiled, and pour the remains with cold boiled water. We all do that at work.)