Very much agree that learning from other industries should happen, and I've asked myself the same question. Why is computer science moving backwards, when other traditionally male fields have become much more gender balanced?
You also have to take into consideration that some people simply don't have ambition for anything beyond their current job.
As for "computer science" moving backwards, I suspect the gender distribution would be similar in any other STEM related major. Nowadays, I question the validity of a CS major entirely. Yes, you will formalize your knowledge, but I think actually coding on your own will teach you more practical knowledge. Women historically tend not to be very well represented in disciplines with formal domains of knowledge, though this trend is changing, albeit slowly. People also tend to forget the pioneers of AI and formal CS theory had women who made great strides in the fields. So I'm not sure the industry is necessarily moving backwards. Perhaps it's not moving as fast as you want it to :)
You'd be wrong:
http://www.randalolson.com/2014/06/14/percentage-of-bachelor....
The percentage of degrees conferred to women in CS is down from 35% in the mid-1980's to under 20% today. The field is in fact moving backwards. Meanwhile, over 40% of the degrees conferred in math & statistics and physical sciences (the "S" and "M" in "STEM") go to women.
That's my long-winded way of saying that CS "moving backwards" is not as accurate as "failing to fix problems that were already there, but not affecting CS as much until it grew up as an industry".