[To be clear: I'm not saying that women's studies is some kind of objectively valid hard-proof field of study or whatever. I do think however it is true that historically women have been excluded in academic study populations, which might explain why there may have been a legitimate desire to have a field of study for that underserved population.]
That may have once been true, but it is no longer the case. Since the 90s, women have earned more post-graduate qualifications than men. Women have parity in obtaining medical doctorates. They dominate the medical and life sciences, the humanities, psychology and social sciences, human resources, education, veterinary medicine, and many other fields. Computer science and some other math and engineering disciplines are rare exceptions.
https://www.aamc.org/data-reports/workforce/interactive-data...
https://www.statista.com/statistics/185160/number-of-masters...
https://www.zippia.com/biological-scientist-jobs/demographic...
https://www.vetxinternational.com/male-vs-female-veterinaria...
https://www.statista.com/statistics/240141/us-doctorate-reci...