I feel like if you really wanted to know you could easily look up the barriers that women face in chess (and in all sports), and I honestly don’t feel like spoon feeding you such basics, so I’m going to just paste my other reply here and leave it up to you to start educating yourself if you really want to:

The solution to men harassing women (and generally making them unwelcome, as they do) should not be to segregate women though, it should be to discipline men.
Which leads me to the real reason why women are segregated (because clearly isn’t about their safety or their inclusion) - because the men involved would have an absolute breakdown if they were beaten by a woman (not a problem exclusive to chess, either).