Gender really is a social construct

So I was passionately ranting in my head about how all isekai where the protagonist's gender changes before reincarnating, obviously have to have genderfluid/NB protagonists, in order to be able to adapt and adjust to having a different gender than the one they spent 15-30 years in.

But then I thought. What if I suddenly became a man? I thought that if I become a man I'd have a terrible time, I'd want and miss my long hair, and my small hands, and to be able to wear pretty clothes and make-up- and then I thought; Is that really all that makes me a woman? What if I was a naturally 6ft tall and built like a cement truck? Women like this exist already, perfectly content in their gender. So if I was reborn bulkier and taller, would I really feel different? What if I was born exactly the same dimensions, but biologically male? What is it in my head that makes me think. "I am a WOMAN!" It's not my long hair or my delicate hands, it's not mascara or pretty dresses. Men can have all those attributes and still be men?

You can't claim I am a woman because of the gender I like, or the gender that likes me? The way I dress, my actions, my femininity? It's all not concrete enough to be the reason why I am a woman.

Sex defines you as nothing more than the reproductive system and hormones you were born with.

But gender? Gender is defined by how a person acts, what kinds of things or people they like, how they choose to look.

People say "that's a girl" without knowing what's in a stranger's pants, they define her gender by what she chooses to present.

A woman can be masculine, and a man feminine.

So what does it mean to be secure in your gender? Does that mean suddenly becoming a man will destroy your perspectives on the world? Will it cause you to struggle to interpret social cues appropriate for your gender? Will you prefer to keep a certain hair style or manner of dress?

Is clinging to what defined your previous gender the entirety of what it means to be that gender?

If I become a man but kept my hair long and my sexual preferences the same, then what does my body have to do with my gender? It's not a defining trait of who I am. Who I am is kept entirely in my head unaffected by the body I am in. My gender identity is what society has indoctrinated me into believing are defining traits of my sex, when in actuality, they are simply just traits that have been assigned to a specific gender label.

If I wear a frilly dress it doesn't change what's in my pants (lol)

If I have long hair, it still doesn't change.

If I like building cars or playing football, what's in my pants STILL does not change.

We say that having a specific gender is tied to a specific sex, but that's not true, and even the opposite of the same statement is not true.

Organs and hormones don't define who you are. Two binary genders don't define your sex.

If I suddenly became a man tomorrow, I think I would be okay. I would have to relearn a lot of things about my biology, but I wouldn't have to change my personality or my tastes just because the junk in my trunk suddenly transformed.

Gender... Really isn't a thing. It's a construct. All there is, is biological sex, and then individuals with their own preferences that are separate from whatever is in their pants.

All these isekai with men suddenly becoming women and staying perfectly okay mentally... It bothered me a lot before I really thought about how little the shape of the meat bag, carrying your mind, is shaped.

Sex and sexuality are not strictly related to each other. So by saying all this I can say that it's not your meat bag that defines your sexuality. You won't suddenly bat the other team just because you get reincarnated as a chick. ...but you might be subtly pressured into that mindset... By societal pressure to model your gender in accordance to your sex.

Gender is just a social construct.

I cannot for the life of me figure out why I am a woman, and why that can't change even if I get a dick, basically.

This was written by a heterosexual cisgender lady, so I have no understanding of the perspectives of anyone trans, NB, or male. XD or anyone other that myself really, so forgive me if my ramblings don't reflect your opinions or if I have stepped on any toes.