I agree with letting it run it’s course. I understand that there are only a very few diseases that can trick your body into running a fever so high it will cause brain damage.
So, in my mind, their are only two reasons to medicate a fever: 1) accompanying symptoms (dehydration) are endangering you, or 2) it’s instrumental and you’re willing to trade your body’s immune reaction (which is working to kill something inside you) for functionality—like getting through an important event, day at work, etc.—that you’re willing to trade for potentially longer illness.