Here is my humble opinion about this, no intention to start a fight:
The usage of the term "actor" when referring to a woman was not a natural evolution of the English language, but was pushed hard in media, Hollywood movies, certain schools in the US, etc.
They also pushed hard for gender neutral pronouns like
xe/xem/xyrs
ze/zir/zirs
Per/Per/Pers
and many other things which won't be mentioned here.
This is nothing but indoctrination through language manipulation about which George Orwell warned us in his famous "1984" novel.
In the gaming world, in the last 2 years or so, there has been a lot of push back against all this from gamers, "influencers", etc..
We have seen big games like
Concord
Assassin' Creed Shadows
etc
failing because they pushed the same ideology onto gamers.
Even in the last "The Game Awards" show, the biggest gaming show of the year, they used "actress" several times to refer to women.
The link below is such an example (there were several):
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When this game started development (2 years ago or more), it might have looked like using "actor/hero" instead of "actress/heroin" for a woman is the "new standard" but there have been quite a lot of important changes since then.
Just my humble opinion, I'm not trying to start a fight.
Best of the luck to the developer, I enjoyed his game a lot and will probably buy it on Steam.