Lets say that you'd like to leave tech. Which industry would you go that is better to women than tech? If there are no alternatives, then what incentives do tech companies have to create an even more acceptable space? At whose expense?
I work in a company with more than 50% women. Many of them worked in teams and companies where it was more than 80% women. They hated it. "Constant politics, catty behavior and backstabbing" is how they describe it.