I have natural big balls and really would not want anything bigger between my legs. awkward to move sometimes and hard to pack into my pants at times.
That makes sense.
Functionally bigger balls make no sense and above a certain size they would surely be inconvenient and uncomfortable. I don't understand why anyone would want them to be bigger or hang lower. It would be about as practical as the foot binding that the Chinese used to do.
It seems common for people to go to extremes to change their bodies. Some women want breast enhancement surgery in spite of the surgical risks and in spite of the fact that follow-up surgery is often required a few years later. Other women have foot surgery just so they can wear the latest impractical shoes. Some men have surgery to make their muscles look bigger.
It makes sense to keep oneself physically fit for both health and appearance reasons, but even that can be carried to extremes especially if steroids are injected to cause the muscles to grow bigger.