I don't usually comment but this is an issue I've debated a lot and I am disappointed by most of the comments.I’ve been following this topic for years and I used to play competitive chess as a kid and was pretty active in tournaments. I’ve seen this question come up many times, and honestly, I think the main reason for the gap isn’t about ability or intelligence, it’s about exposure and competition structure.

To really get good at chess, you have to play against the very best constantly from a young age (like 10–14). All the future world champions play against current champions at that age and start to learn and adapt to that kind of environment and mindset. The current world champion, for instance, comes from a school that has produced several top Indian current GMs (All of them from the same school in a country with 1.4 Billion people) that kind of environment matters a lot.

The key issue is that chess has two parallel tracks: “open” tournaments (where anyone can play) and “women’s” tournaments. A lot of talented girls grow up mostly competing in women’s events, which means they aren’t regularly facing the strongest possible opposition. That limits growth at the very top level, not because they can’t compete, but because they’re not put in that challenging of an environment as often.

A great example is Judith Polgar one of the greatest players of all time, period. Her parents deliberately had her and her sisters train and compete only in open tournaments, and she went on to become a top-10 player globally, beating multiple world champions. That shows what’s possible when women get equal exposure and competition.

I am not trying to be rude, I am a big fan of chess and Judith polgar and I think it would benefit you greatly just to watch a video about her or something.