That is 100% true. Medical science treats the male body as "normal" and does most studies on males, and women as the outlier and if the male-designed treatment doesn't work the same way on women then it's the woman's problem. It's a real fucked up situation and it's still going on.
I just don't think it's the same for athletics. I've done athletics and worked with athletic people of both genders, and it's absolutely not true that women athletes are just treated as small males. I mean, if that were true and significant, all it would take is one coach who trained women properly and female athletes under their supervision would have a huge advantage over all the other improperly-trained female athletes.