This is incredible, I had no idea that a person like this existed! A child under 16 years old drinking while surrounded by world leaders, what can that do to his ego? Seeing those pictures of Lukashenko and his son with world leaders and their wives gives an impression of imbalance, rather than a man and his wife on both sides, it's a man and his son. And his older brothers are probably not especially pleased, either, that they were bypassed in favor of the younger son.
In general, passing succession down for reasons of birth and not merit is not a recipe for success, especially if the boy was given everyything he wanted and didn't have to work for it. But I wouldn't happen to know what he does in his spare time, maybe he studies and works hard while off the world stage but if I were to guess, why work hard when you don't have to? But that is a pessimistic viewpoint, I would hope I'm wrong.
I wouldn't necessarily say that this is the only boy in the world with a golden pistol, many other rich children can have one if they wanted. But he certainly has much higher stature in terms of international political exposure.