I think V and Jungkook must have been really flustered to hear that there were as many as 20 fans who came all the way to the hotel gym at 2 AM.
I understand your affection, but I think following someone to private spaces like hotels or gyms for rest and exercise cannot be justified, even by fan devotion.
Since both of them have personally asked for their privacy to be respected, I think it is really important to keep each other's boundaries so that they can exercise and rest comfortably.