The most tedious sort of woman seems to want daughters in the assumption that they will be able to 'stereotypical girl things' together, as if their daughter will be an equally tedious mini me rather than an autonomous human being.
I don't think it's about stereotypes, at least not for many women. I'm having a boy and super excited about it but I admit that I did originally want a girl. (I only plan to have one child, so that's no daughter for me).
It's never been anything to do with wanting to do stereotypically girly things, or a belief about the way girls are, for me - I'm not stereotypically girly and I don't believe most people adhere to gender stereotypes at all. But there are certain things that people of the same biological sex understand about their shared experience that others don't. Periods, sexism, the pay gap, expectations on women, questions regarding the role of women as wives or mothers, or biological sex v gender, relationship perspectives, pregnancy, motherhood - these are all things I can talk to my mum about out and we understand each other in a way I don't share with my dad, or other men.
That's why part of me wanted a daughter - not because I like pink (which I don't, btw).
Complaining about belief in stereotypes and then stereotyping women who want daughters as tedious gender conservatives has a certain irony.