I'd ask you why you care so much?
I care because it is all tied up with gender stereotypes and expectations.
Even before mine were born- if it kicked, ooh, it must be a boy, a little footballer! Or ooh, it kicked, must be a girl giving you a hard time already!
iME gender disappointment is a consequence of gender stereotypes. People imagine little gitls looking pretty and helping mummy around the house, while the dirty greedy boys fight each other, play outside and eat everything in the house.
If we stopped with all this “boy” and “girl” crap and started treating kids like humans with a wider range of likes and interests, maybe people could picture themselves shopping with a boy or watching footy with a girl.
I also think many women reject boys as they buy into the “man is a son until they take a wife” thing. They envisage their boys leaving home, getting married and focussing on wife and family. So they invest more in girls who are expected to stay close, provide grandchildren etc. I’m willing to bet most parents, would move closer to a girl to help with grandchildren, where they wouldn’t for a boy, if they had one of each...