Fairness will always be relative.
Timely trends dictate the society's expression of distaste or praise, rewarding groups and individuals. Truth holds little value in a wider scale because reality- including the distribution of advantages- is manipulated by perspective in one hand and powerful structures in the other. Since some advantages are ingrained into nature, advantages will not inherently be unfair. There is beauty in disparities in the heights of trees despite the fact that that excess growth may coincide with diminished sunlight and nutrients for others.
Through the establishment of societies, however, nature has surely been corrupted. Structures that cause disproportionate advantages to some while harming others (white supremacy, patriarchy, etc.) give insight into the more catastrophic effects of advantages. The lack of an advantage can mean inability to care for oneself or one's offspring or even to have one's life. Even to the beneficiaries of these structures, they continue to unknowingly experience the degradation of their own hearts and limiting their own true capability. These imposed advantages that destroy the will of individuals go beyond unfairness but threaten the stream of consciousness that rope all humans in this world together.