True, and there's also no fitness scorekeeper. Wars are fought and won by having a diverse set of abilities. Physical prowess is one, as is intelligence and social skills (diplomacy keeps fighting from happening). So if reality is that we recognize differences in physique for sport, then we can accommodate these physiological differences in a well-rounded military that is inclusive to all who participate in the common defense of the nation.

This honestly sounds really great in theory, but in reality the accommodations and inclusivity became the whole game for the DoD, and winning wars kinda fell by the wayside.