Counterpoint: If not you, then who? Your daughters could be part of a cultural shift with respect to the tech workplace, so why discourage them?
And do you think women having to work with computers all day would end up being less grumpy than men who have to do it? Why?
You can't "patch the bugs" in the life you lived by telling your child how to live, you just have to try to teach them so that they fully understand the situation and will make the "right" decision when the time comes. Sometimes they will have the information but still make the "wrong" decision, which is frustrating I imagine (no kids, but I've seen people do this). This is normal though because there are some things you can't explain to someone, they just need to experience it. How to love and be loved is the big one, but there are a lot of other smaller ones.