It's almost as if lately the number of futa vs non futa games has skewed higher than in previous times. Or do you expect that all ratios remained static over time? (You don't do you, you normally seem rational.)
I am someone rational, in the present case it's you who aren't.
Saying that there isn't more game with futa/trans content would be a lie. This even if
Lerd0 is right, nowadays it's more an increase of trans content that we face, than an increase of futa content.
But in the same time it's why I shown two metrics. The total number of games, that have less than 10% of futa/trans content, and the number of games currently in progress, that have a bit more than 14% of futa/trans content. And it happen that if 14% is high enough to be noticed, it's still fucking low and easy to avoid.
It also happen that there's good stories with this content, like by example
My New Memories,
Futagenesis unveiled, or
Shattered. This even if only the second is effectively about futa, the two others having transgender content.
The result of this is more futa optional than previously.
It pass from 9.6% when you look at all the games, to 14.25% when you only looks at those currently in progress. I'll not do the math, because it's past 3AM here and I'm lazy, but it's what ? A ~30% increase for in the end what still stay a small difference.
The issue isn't that there's this more futa/trans content, but that good/creative authors are now more pron to add transgender characters, when not directly futa. What mean that effectively, by filtering on the description, and therefore only caring about interesting games, you are probably facing a bigger increase.
But in the same time, like you said yourself, it's optional content. Therefore it have near to no impact on the pleasure you can get from the game and its story. In
My New Memories by example, because for the two others it's the MC who's trans or futa, since the trans character is one of MC's daughters, you can't totally avoid the subject. You'll have to accompany her on her transition. Yet it's just story wise, it will not imply sex or anything ; you'll just be a caring father and avoiding sexual interaction with this particular character will not deprive you of the well wrote and handled story.
Now that the pedantry is out of the way, why don't you try answering the actual question? lol
Because you're just pointing the overused trope.
Yes, historically speaking futa are expected to be over sexualized characters ; the male tendency to dominance and the female sexual appetite, all this served by a big dick. But when you look at the recent games, it's also a fading trend.
There's the diehards, that will never change this because it's what interest them. But there's also those who want to build something, and therefore need to goes out of the cheap cliché, because they lead nowhere and drastically limits the personality and story development. You don't go far with "me futa, me fucking you again and again", and it's hard to make the characters don't looks like clones when they only think and act that way.
But even a futa addict like
Icarus Media , is writing more "natural" characters. While the mother is the typical futa, the grandma is more on the side of the typical woman. She don't hesitate to have sex, but it's mostly because she haven't had some since long. And while they have a big dick accordingly to real life standard, it's not really bigger than MC's one.