Sexist attitudes by men in the tech sector do not affect the decision making of teenage girls (except if they exert those attitudes to their teenage daughters).  But they do affect the decisions of woman engineers who work in tech or Woman Founders who seek to raise capital from 3rd parties.  That is the point.

Studies have proven that woman in management and leadership positions produce improved outcomes.  Improved incomes benefit everyone in society.  That should be a societal goal.  When environments restrict woman from participating and succeeding, that is a problem...and that is again the point.

Would having more woman in oil rigs produce better outcomes or more garbage collectors produce better outcomes?  Think about that for a moment and let me know...