It could just be your family dynamic? It's a mindset that you've been surrounded by. My late stepdad's mom used to swear up and down that women couldn't play sports because our insides would fall out. It's not true, yet, it's a symptom of a mentality that permeated that family's dynamics. Because that wasn't my family of origin, I was better adept at sifting through that. It stuck in my mind all these years. One of my grandmothers played basketball when it was a half court game, hence my jaw dropping with a tinge of adolescent-you cannot be serious thought in my head.
Raising girls does have its own challenges, I would imagine. I will say boys can have moods to rival the best of them.