Having more female game devs is like having more Australian game devs who know when it's summer there. A big difference though is that unlike Australia which has less than 0.5% of the world's population concentrated in one area, women are over 50% of the world's population and are evenly distributed. You can have a lot of games without Australia but almost every game with people in it needs to have women or you'll be telling a strange story. Imagine a situation where most games have scenes in Australia but most game devs don't know it's summer in January there. That's a problem.
Where it can get mixed up is that a lot of "knowing the seasons" as a woman is knowing stuff that makes men uncomfortable. A female game dev making a realistic female character can introduce everyday factual experiences about things like sexual harassment, birth control, or feminine hygiene, and some male players might say she's trying to make an activist game and she can reply, no, this is just my life. It would be like getting mad at an Australian game dev for always going on about summer in January as if it's their fault the sun spends a lot of time in the sky around that time.
(This is leaving aside the economic argument that developer jobs tend to be good and therefore desirable, and it should be suspicious when any particular demographic is dramatically underrepresented in a field with mostly good jobs.)