I knew someone who briefly worked in this field and quit due to the corruption.
One day he does find endangered shit. He tells his boss, “hey you know they have so and so on this land, actually you gotta call this one.”
The boss sighs and is like, “let me explain how this works. We can do this and call it out, but next time this guy has a big project, he’s not contracting out to us. And the other guys will definitely let it slide. Either way, they’re building, and we end up going out of business eventually. You might win this one time, but eventually it won’t matter.”
I think at the end of the day, he quit and they built over it.
The main world championship and title of GM is open to everyone, so it’s not truly split.
There are FIDE women only tournaments but that’s due to there being less participation of women. When you have something like this where the skill distribution is gaussian, if you have like 50 women compete and 1000 men, you will notice that it’s extremely unlikely for a woman to ever reach 1st place just due to statistics. Replace women and men with brown hair and blond hair and you’d see the same phenomenon.
The tail of the statistics where you see extreme deviations of improved skill would be dominated by the population with much larger participation.
To counter this, they have women only tournaments so that you always have a woman in 1st place in some tournament, basically to improve participation and convince more girls to play when they’re young.
There are of course probably other factors but these things improve participation and are meant to help get more women in chess, not separate them out.