It seems maybe you guys were right to be suspicious of gender reveal parties, Cosmo reveals:
Dear Parents-to-Be: Stop Celebrating Your Baby's Gender
Heed this warning, would-be party throwers:
"For starters, gender-reveal parties don't actually reveal gender—they reveal anatomy. Gender is a wholly different thing, inextricably tied to the social constructs around it. (Fun fact: Blue used to be the color most associated with little girls, due to its association with the Virgin Mary. But Hitler—yes, Hitler—feminized the color pink by forcing gays to wear triangles in that shade during World War II.) A gender reveal conflates the two."