It really isn't. I have never subscribed to the idea that specific character traits are "male" or "female".
Physicality yes when it comes to post puberty. Women (when I say this, I'm referring to sex. Sex defined as what's between your legs, and how puberty went) generally have wider hips, men have generally broader shoulders.
I am interested to learn the difference, if you have something you can show me.
I'll try to answer it. I tried to keep things simple, with you earlier. So now I'm going to explain it in a much larger picture. (Still oversimplifying a bit. But it's not so reductive it gets the point across)
What is a woman? What is a female brain? If you said it, I trust that you can support your statement with either evidence or reason.
(This is a bit long, but will explain that question)
Our brains and bodies are linked. That much is obvious. However, imagine that there are flags that can be only set once. There are several flags. to make the distinction, since our bodies aren't exactly the same as our consciousness. When I say brain, I'm referring to consciousness.
In a super ideal world, the binary "male or female" concept, would be only that and match the consciousness/brain 100% of the time.
When it does go without a hitch, and fit it's in within the "Male or Female" sex
binary. So in other words, answering your question partially here. What makes up a Male is very similar to what makes a Female. Hormones that are completely one or the other,
no mix and everything went smoothly. However, this is under the "sex" system. Which I'll get into why that line of thinking is wrong.
nature is extremely messy, and mixing can happen a lot. That's natural. However what's natrual, doesn't mean it doesn't cause discomfort.
So when I said "female brain" I mean a Brain that :
A. Developed with estrogen being the highest/most present
B. Flags for say, how you think you should sound, or how you act, are set to be more traditionally (considered) feminine, and also STAYs that way through out development.
C. also assuming puberty's flags are set for what is commonly found during traditionally female development/ high amounts of estrogen when that happens.
However, what I just said, doesn't go perfectly.
You have essentially 3parts. With all 3 of them can result of something the binary system cannot handle.
1. Body develops first, and so your sex, is set up before your brain develops.
This can break if say, you get a XXY. In which immediately the binary system breaks apart.
2. the not conscious part of your brain(body flags for puberty) can not match your nethers/sex, as they develop not in sync.
This only happens during and after puberty. However the flags are usually set at birth However this can distress the concious since:
3. the concious flags, also don't develop in sync.
The amount of time it takes for our brains can lead to anomalies the traditional binary sex system does not account for.
For example. I already mention XXY. That would cause a situation where point #1 can mismatch.
however, the part that really causes the need for the term "gender", is 2 and 3.
Due to those flags not all developing at the same time, and really being based on whatever hormones are present. There's several situations that can happen
You can have a mix of male and female flags for puberty (#2 mismatching with #3). However consider yourself as a dude, you dress up as one, you may even have a dong. But #2 is developing more feminine/higher estrogen. Now you need gender affirming care, since your hips are widening, while to you, they shouldn't be.
However the opposite CAN also be true. (#3 mismatching with #2) You can consciously consider yourself as neither male or female, since you got a mix of all those flags (conscious flags). You don't exactly quite fit into either category or a dude or girl. But puberty wise, it wants to develop you into a more female body. Which while you may consider yourself closer to a guy, but still not that, than a girl. Developing further into a girl is going to make your
gender dysphoria worse.
This is the reason why there are "they/them" pronouns being used. since they (those people) don't fit exactly. We (English dictionary) don't have a word for them. So they them is being used since it's most neutral and encompassing.
So I'm hoping you read all this. What's considered as a "female brain" is assuming all those flags/markers and traits we consider traditionally associated historically female, were set.
However due to the brain and body not developing at the same time, with one having a leg up over the other. And several developmental stages.
Things can and do mismatch. And as a result, can result in a female(traits we associate with a women) in a males body(physically appearing as a guy), which at least the binary sex system can semi account for post transition.
However what it cannot handle. Is if the conscious part, doesn't fit into either one of those categories. And all these markers often are set bit before birth. So by the time someone is 7-9. They already have a strong feeling they don't belong. And that's because they straight up don't.
And that means that the "sex" system, is just wrong, and we need a more granular way of thinking about it. Since it encapsulates straight up too much, and oversimplifies too much to a strict binary. When it's not a simple on off switch.