She seems to have added the erosion of traditional roles based on sex into the argument that people cannot change sex just as they might change a shirt.
It is a pity she has done that I think because you can say there is no such thing as being able to change sex while at the same time allowing that women can have any number of roles, including traditionally masculine ones, and vice versa.
I agree.
I also found the article confusing. Is there a translation of the original piece anywhere?