Transgender people fundamentally feel they were born in the wrong body. They take hormones and have surgery to make their outside match their inside.
This is gender dysphoria. It's a condition. It doesn't mean they are literally in the wrong body. There is no such thing as an innate essence.
If you woke up tomorrow in the body of a man, yes of course you would be a man! Biological sex is a description of potential reproductive function. That's it.
It's not a description of the way you think, feel, or any sartorial preferences.
Back in the day, before this all kicked off, men had to sign a form to say they totally understood that they were biologically male, before they were given a GRC.
I don't suppose the medical profession wanted to encourage people in the delusion that they were actually of the opposite sex.
If you need further proof that the term 'being born in the wrong body', was just a stepping stone, it is now entirely transphobic to say even that.
Now the body is not wrong. The penis is female. As are the testicles. Or they are a genital abnormality, in some cases. Which need to be corrected with surgery.
XY people and XX people are both female, just with varying degrees of anatomy.
It's all nonsense.
And our children are being taught it.