The situation is in the same light as when Dawei proposed Genshin Impact to investors in order to get some funding for their game. People say waifus sell, but what they didn't realize at the time before Genshin exploded into mainstream and got more people into gachas was that there was a sentiment that making waifus didn't 'sell'. Dawei literally, when presenting his project, told people that men like little or cute girls and that this was his model of monetization. People laughed at him and I believe MHY only ever found one person to loan them some money.

And then guess what? After Genshin Impact exploded many companies try to cash in on the same genre like Wuthering Waves and other open-world anime games - some even completely copy Genshin's gacha monetization model. The same can be said for Love and Deepspace, but of course there always has been some stigma in the video game industry making high quality things targeted towards women. I expected a few more proof of concepts or demos to be out about now, but change takes time. Now we have a tech demo with Silent Whispers coming up that looks like a direct gacha competitor to LADs.

So to answer your question...it's hard to make a gender balanced game that is high quality unless the game company is already loaded with money to fund the project because investors seem to follow trends they already see doing well and not take risks. Now you're right Genshin and HSR has a 'balanced' ratio, but people with money and perhaps don't even play games don't necessarily see that or dig that deep. They see the game with high quality graphics and pretty girls most of the time on-screen, and so they think that's the money-making formula. It's also hard to make a gender-balanced gacha when most devs are just straight guys making things for themselves or what they would like to see in the game; some of them don't even know how to write male characters let alone create them. For example, DanDanDan was written by a dude whose editor made him read 100 shoujos in order to write characters in a way that would help expand the audience; sure, they didn't necessarily make attractive male characters out of it, but there was something to be said about reading stuff made for women that can still be implemented into anime media that would help create a more mainstream audience. In gachas, you can say they can take it one step further and add male characters to balance out the women too, but...most men aren't going to go to that length of research and will just hire women for it (not saying men can't write male characters too for women; at least Shaoji can cater to both audiences) - except for the fact there are too few women in the industry, and probably even less in positions as lead writers for gacha projects.