If we start to examine fairness in sports closer i think it all falls apart pretty quick. There are so much factors that can aid a competitor while drawing someone else back. Where someone was born, how they were raised, which trainers and equipment they have access to, what personal crisis happens to them, etc. all are things that are largely based on luck. Any rules that are made by the hosts of a given sports event are also somewhat arbitrary. That said, i do think there is an advantage for biological males in physical strength, even if it starts do diminish over time with HRT and even this study doesnt prove it otherwise, just states that previous studies were non conclusive.