I don't see the need either. Can't say about racetrack use, but I rode my Duke pretty hard this very hot summer and it stayed in the middle of the heat range on the gauge. Yesterday I really beat it ie. extended use at 6k to 8k rpms and the gauge stayed centered. It was cool out but still impressive.
BTW, when I got stuck in heavy stop and go traffic the fan always worked to keep the bike cool.