Back to the OP topic:
That article is awful because it mostly pushes the TRA agenda into the main stream. And that agenda is completely misogynistic.
Self definition is ok. As long as you realise that not everyone has to accept your definition of yourself.
Biological determinism is a different thing. We shouldn’t pick on someone because of how they were born. No one can help that.
And since it has been well proven that there is no such thing as male and female brains, especially at birth, then we can agree that definition yourself as a woman when you are biologically a man is your own choice based on your gender conditioning.
Which is fine. But don’t expect people to roll over and give up their hard won freedoms to allow you to exploit them.
Would anyone really expect a white man who wanted to define himself as African American to get a scholarship on a program for African American students? Or for an adult who wanted to define themselves as a child to be allowed back into primary school? Or for someone who defined themselves as a tiger to be allowed to live in the zoo?
It is ok to help and support people- up to a point. We should be free to make choices for ourselves but not to trample on the rights and needs of others to do this.