If there’s no genetic advantage for men, why did Chess have separate divisions?

The ACTUAL answer is misogyny. Chess was(and still is tbh) a very misogynistic “sport” back in the day, and many male professional chess players refused to play against women, and the ones that did play against them were often crude. To try and get more women interested in chess, women only divisions were created. It has literally nothing to do with genetic advantages.