On the other hand, (although I cannot be arsed to read Miz Snowflakes' no capital letter comments), not knowing the sex of a child would, in practice, stop people assigning them a gender role, would it not?
And, later in life, as long as their appearance was androgynous, that would continue.
Obviously, if they were female, they would still have skin in the game in terms of biology and reproductive rights etc. But might they manage to avoid objectification, harassment, an expectation that they can't do maths but are highly skilled at making a BLT?
In which case, I can see the point.
Although hiding one's sex in order to be treated correctly, does seem a little arse about face.
And not at all feminist