And what good did it do them to be called Gods children? What kind of advantage did they got from it? And if we are going by, they were 'believed' to be gods children by the citizens for Kuntis and their own benefit -- not because they were Gods children -- just myth --- then there is that, same applies for Karna. who knows who Karnas real father was and if his kavach was invincible or not -- the only father to him was Adhiratha like the only father Pandavas had was Pandu -- not the mythical sun god who is usually believed to be Karna's Father and other gods who are believed to be Pandavas fathers?
And I am not familiar with the techniques of cheating you can apply during dice and the text doesnt mentioned it either, so i am left guessing.But Shakuni used 'Unfair Means' over and over and over and over again, at least that is clearly mentioned so there is that.If the citation doesnt mention the kind of cheating techniques Shakuni was using, well, I cant do anything about that.