What practical steps can we take as parents to counter this? I don't know if my DD2 will want to do tech-y stuff, but I don't want her to feel like the doors are closed to her. It should be her choice.
My advice would be: Treat her like a human being, not as a girl.
Also: Internalize the message that girls are just as good as boys, so when she expresses her concerns, your reaction is natural.
For example, my DD was 6 or 7, I think, when she was exposed to the notion that dads are supposed to prefer sons. She'd probably been chewing on the question for a while before she asked me if I wished she'd been born a boy. My answer: "If you'd been born a boy, then I would have played football with you, wrestled with you, taught you to hit a baseball, played violent video games with you, done computer stuff with you, put together or fixed things with you..."
And DD had a grin on her face as this list kept going on, because they're all clearly things that are usually in the "boy" category, yet we had been doing all of those things for years. And before she could wonder if I was trying to turn her into a boy or something, I pointed out how much her girl peers loved doing some of those things, and there's nothing wrong with women liking things that are fun.
