That's not the only way men and women are different. In fact, no matter what kind of measurement you use, they're statistically categorized differently. The Olympics are smart enough to take away people's medals for using cold medicine, and even a sporting event as modern and enlightened as that makes the sexes run in different races. You might not have noticed, but that's sexism on a grand and fantastic international scale. It might be because men are faster, but it also might be because halfway through the race, they know women will get all emotional and start crying and the men will try to pour beer on them and start a wet t-shirt contest.
Some experts offer a different view on why the Olympics seperate by gender.
It's because if there was ever a male rhythmic gymnast prancing on a nap mat with a hula hoop and a ribbon or whatever the fuck goes on in that crap, it would become the duty of every other man on Earth to stick that hula hoop up the guy's ass. If that's true, and trust me, it is, the Olympics are saving butt doctors valuable time by keeping the sexes apart. However, almost every other organization in the world keeps men and women in different categories for less noble reasons. If you open the Guiness Book of world records, every world record has the main, official world record and then a lower record for the women's record. Sorry, I didn't write the book.