whenever female athletes in a sport start getting similar resources to the men (funding and training comparable to the men's ever since childhood) the difference in performance between the men and the women starts decreasing.
if female athletes are not paid enough to make a living of their sport/require to have a side job for healthcare or retirement funds, they won't be able to reach the same level of athleticism as the men, as they will spend less time and energy training.
if female athletes start getting high pay/professional levels of training later in life compared to the boys', they won't reach the same level of athleticism as male athletes who have been training at high levels from a younger age.
if the best facilities and best coaches go to the men, the women won't reach the same level as the men.
if girls who do sports are not taken as seriously as boys are (do not receive special permits to leave school earlier to go training, etc), the women won't reach the same level as the men.
as long as female athletes and male athletes have different levels of opportunities, we won't actually know if there is a substantial "natural" difference in average across men's and women's performances.
i mean, look at professional ballet dancers. those girls undergo hellish training since a very young age and ballet obviously does not consider female dancers a lesser category of dancers. look at what female ballet dancers do with their bodies while pretty much starving themselves. what do you think a woman can do if she receives rigorous high-quality training since childhood and also eats?