Why in the Uglies people don't have fight or arguments

This is because conformity is the main precept of society. The pressure to conform plays a major role in Uglies. The dystopic world in which the novel is set values conformity to such a high degree that it has instituted a compulsory cosmetic operation to ensure that all people look the same and are therefore equal in the eyes of others. People are supposed to think and act in the same way .