There was a move for it, especially in the sports that weren't so reliant on muscle. And you get exceptional women in every sport that could compete.
Like you get exceptional men who can give birth? 
Women and men have different bodies. Women are not small men with a couple of extra organs. People sometimes suggest that female athletes should just "try harder", but this is like telling a man to "try harder" to get pregnant.
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If you know sport, you know this beyond a reasonable doubt: there is an average 10-12% performance gap between elite males and elite females. The gap is smaller between elite females and non-elite males, but it’s still insurmountable and that’s ultimately what matters. Translating these statistics into real world results, we see, for example, that:
Just in the single year 2017, Olympic, World, and U.S. Champion Tori Bowie's 100 meters lifetime best of 10.78 was beaten 15,000 times by men and boys. (Yes, that’s the right number of zeros.)
The same is true of Olympic, World, and U.S. Champion Allyson Felix’s 400 meters lifetime best of 49.26. Just in the single year 2017, men and boys around the world outperformed her more than 15,000 times.
This differential isn’t the result of boys and men having a male identity, more resources, better training, or superior discipline. It’s because they have an androgenized body.
Continues: law.duke.edu/sports/sex-sport/comparative-athletic-performance/
Not that I was ever fussed, sport is mostly an overrated way to put some people off physical activity for life, encourage others to wreck their bodies and still others to gamble. Meh.
I find that people often sneer at women who want single-sex sport with women for placing too much importance on sport. What puzzles me is that no-one ever sneers at transwomen for placing too much importance on wanting to play sport with women.
Anyway, I'd like to discuss the topic of encouraging women to wreck their bodies. Elite female athletes already have to tread a careful line between achieving peak performance and wrecking their bodies. What happens when we force them to try to close the 10% performance gap between males and females, in order to win team places?
Well, I'll tell you. They will try, to their physical detriment. Have you heard of "female athlete triad"? The incidence rate of that is going to go up.
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THE FEMALE ATHLETE TRIAD: A SYSTEMIC HEALTH CRISIS IN WOMEN’S PRO-SPORTS
content warning discussion of Eating Disorders
Being a professional athlete can be physically and mentally exhausting. Pro-athletes are expected to beat the top of their game. They are required to spend a significant amount of time training and conditioning in order to strengthen their bodies and build endurance. Of course, years of training and physical conditioning can lead to greatness in the pro-sports industry but at what cost?
Female athletes face systemic health issues and sexism within the pro-sports industry due to rigorous training and the pressure to maintain a certain body image. Exhaustive training combined with economic anxieties and career stress can put female athletes at risk of developing unhealthy eating habits, menstrual dysfunction, and poor bone health.
The Female Athlete Triad
“The female athlete triad (the triad) is an interrelationship of menstrual dysfunction, low energy availability (with or without an eating disorder), and decreased bone mineral density; it is relatively common among young women participating in sports”, according to a 2012 study by the National Center for Biotechnology Informationhealth journal.
The triad commonly affects young female athletes but it can later cause long-term effects that follow them into adulthood and their professional careers. It is caused by an “imbalance of energy intake and energy expenditure”, says Neville H. Golden in a 2002 study by theInternational Journal of Adolescent Medicine and Health. At a young age, athletes are more susceptible to advice from their trainers and mentors, which can negatively affect their health.
Continues:
www.hercampus.com/school/sjsu/the-female-athlete-triad-a-systemic-health-crisis-in-womens-pro-sports/