I was raised semi-orthodox Hippy, including this bit of received wisdom.
So of course I bought RocketBoy1.0 a baby doll along with other toys. Nope, sorry, nothing. Okay, but he doesnt like any toy with a face. He had a complete meltdown one evening when his toddler brain wanted to climb into a toy car and couldn't and he was totally train crazy. So maybe RocketBoy2.0 will like the baby doll. Nope, sorry, nothing. But he liked his stuffed dinosaur and fell asleep in a pile of Megablocks (like LEGO, but huge) more than once.
Then RocketGirl came along and took possession of the baby doll and never played with any of the cars or trucks. And she refused to wear hand me downs from her brothers that were excessively boyish.
We don't watch tv and had minimal movies and other gender-normative messaging in the house when the kids were small. Mrs. J doesn't wear makeup or girly clothes (jeans and tees gal) so RocketGirl isn't getting gender messages of what she is supposed to like and dislike - those preferences were all set to factory defaults, whatever they are.
So I'm gonna throw the BS flag on the "social construct" thing. It made sense, I guess, within the preconceived notion set of Marxist-influenced Feminism, but fails on exposure to reality. My boys liked "boy" stuff and not "girl" stuff, and my girl is totally a "girl" and has been from the time she could make her own choices.