Why can't she decide for herself?
Let's look at a recent survey:
* More than half of girls (53 percent) ages 16 to 24 feel they lacked the confidence to do whatever they wanted to do after puberty.
* Almost all girls (89 percent) feel there is pressure to conform to the way they're supposed to feel and act.
* Sixty percent of girls believe that society's expectations have a negative impact on their life.
* Girls are almost twice as likely as boys to say they did not feel comfortable doing an activity in school because of their gender.
Why can't she decide for herself? Because society is filled with arrogant assholes who insist that women must conform to the traditional roles that women have always been confined to. Any woman who dares to stand up and make a different choice is harassed, abused, derided and shoved back down.
This is about trying to remove the social pressures that force women to conform to traditional roles, not forcing them to become engineers. You don't like that idea, so you're trying very hard to make a straw man work, but it's just making you sound like an arrogant asshole who wants to keep the status quo in place.