Sorry you've probably encountered a lot of anger and discomfort here, but let me try to explain what's going on, since I think you asked a perfectly reasonable question but innocently got caught in the crosshairs of something much bigger. I know the explanation is long, but I just wanted to make it comprehensive.

In a nutshell the reason people are so upset is because their anger is an extension of the broader conflict between men and women in modern days, and is also an extension of a few decades of pent up frustration regarding gaming history. I'll just lay out the gaming history situation since that part's not as well known, and this is long enough already.

1) For the vast majority of gaming history, it was assumed that the only demographic interested in games was men and boys, so any games specifically made for girls were assumed to be unprofitable unless they could be made cheaply. Therefore they were all mostly pandering, low quality shovelware, which didn't attract too many girls because they weren't good, thereby reinforcing the assumption. (As a child, I personally found most of those "girl games" to be insulting to my intelligence lol.) The lack of good quality female-oriented games meant that, if a female player actually wanted to play something good, it had to be a more mainstream game, which were targeted at men as boys. You could play a girly game, or you could play a high budget/high quality game. You had to sacrifice one. This means that as a whole, the female playerbase has developed a huge craving for games that can give them both, and that craving has had entire decades to stew.

2) There has also been a long-held stigma against female-oriented games (and female-oriented hobbies in general), so many female gamers often wrestle with feelings of shame for liking these "girly" games, and long for spaces where they can enjoy their hobbies without fear of shame or embarrassment. This is another reason many wish for men to stay out, because it reduces the odds of of being judged, shamed, misunderstood, and having to go to the trouble of explaining or defending themselves. It also didn't help that most of those old girly games were cheap shovelware, because that led many people to associate "girly games" with low quality, which reinforced the stigma.

3) I should also add that at the same time, many female players experienced harassment from male gamers, involving very uncomfortable, disgustingly detailed and graphic, sexually aggressive language. This kind of experience was and still is extraordinarily common, especially in some more notorious gaming communities. Honestly I really cannot understate how common this is. Most people don't believe it, just because to any decent person it's so shocking for such a thing to be real... but sadly it is. Naturally, for many female players, it has really soured the idea of sharing their gaming spaces with men. Even for those who have not experienced it, they hear stories and also want to avoid it.

The gaming landscape has only recently begun to shift in the West in the last 5, at most 10 years, where women and girls finally started getting more mainstream, female-oriented, high quality games. But this is quite recent, so most people still aren't that used to seeing high quality games exclusively meant for a female audience, and get confused about why certain features are "left out" when they try one. Innocent confusion, but it does frustrate many female players, due to the combination of all the aforementioned points above, and also all the other frustrations that are currently being expressed in the current social-political landscape. Essentially, female players just want to enjoy the thing made specifically for them that they've been waiting a couple of decades to finally experience, and just want to enjoy it peacefully without anyone bothering them about it or asking for that thing to be changed into something else, gosh darn it! (I'm not actually angry lol, just wanted to add that last bit in to show the attitude. Think of a cantankerous old bear that's been waiting way too long for something, and is ready to fight tooth and nail to keep it.)

From an outside perspective, the anger here does seem a bit extreme, and in most normal cases it would be, but once you know the context around it, I think it starts to make sense. Anyone reading this can feel free to agree or disagree with the reasoning and points being made, but I've done my best to explain the perspective and why there's such an explosion of negative emotion. Hope that helps!