In psychology there are studies of masculinity and femininity. What the traits of these are had been defined, measured, analysed etc.
So if this individual claims to be feminine, shouldn’t they be explaining that by engaging with the concepts we already have of what constitutes masculine and feminine behaviour. We must all know feminine men, and I don’t see that trans individuals are coming across as particularly feminine. If they want to get into the debate over whether a ‘female brain’ is innate or socialised, shouldn’t they then have to explain that in terms of how they exhibit the claimed traits?
As a parent I have found it essential to think about feminine traits in terms of how I wanted to raise my son. Femininity and masculinity do refer to something in a sexist society. They can’t just be taken to mean anything simply because someone wants to claim to be feminine.
I also found it disturbing that this person considered males to form identity through producing something while women can just be. It treats women as some kind of empty category you can escape into if you don’t do anything. It ignores that most work is done by women and that women cannot just ‘be.’