Have you seen this person? You know that UFC let trans woman compete (more like beat up, or massacre) against plain old women. You can argue as long or as hard as you want, if you had testosterone in your body since you have been in your mom's belly up until the transition, you will have more bone density and muscle strength than pretty much any women, athlete or not. This is true even if you take blockers, etc. no matter how long. How they feel about it doesn't change muscle and bones structure.
Look at the fit ladies behind Kayla, this is what fit women usually look like, actual MMA women fighters are more buff, but they still don't look like men when you take a quick look.
And look you have to be nice and inclusive to actual women too, letting trans athletes compete in many sports means erasing women from these sports... and it's not just about losing, there was a trans fighter in the MMA that broke their opponent's skull (yup a woman), and then she said something to the effect that not so long ago you were going to prison if you beat up a women and send her to the hospital, but now you get paid for it.
However neither has the body type I suspect strong women would end up after a civilization collapse, I think many would end up looking like farmer women did 100 or so years ago (not the urban type), so that means I think the common lady would look like the old times farmer's wife.
So if they want to be "realistic" why not take someone who was born as a woman as a model? or one that could be a model for transitioners, many are overly feminine, same for those MMA fighters on the picture above, they pretty feminine (and I would not want to end up in the ring with any of them).
Anyway, that's the designer's choice, we have to live with it, but we don't have to agree with the explanation.
If you believe in global warming - and you have some claim of basing your thoughts on science - you cannot reject the existing notions around biological sex/gender, this is literally more sure than pretty much anything in science.