It think this is the main reason. Stereotypes are great for capitalism. I can speak only for germany, but in the 90es i felt, there was a movement to reduce this gender stereotypes stuff, but this got completly reverted in the last 15 years or so. Nowadays there exists a Kinder Surprise Girls Edition with pink flowers on the packaging and special potato chips flavors for men and women (WTF). I also recognise the effects frim this in my personal environment, with young parents going full into this stereotype things. The boy has to play football from day one he can walk. The younger daughter can not wear clothes from is older brother because they are not pink and she is put into ballett school ignoring that she obviously prefers football too. It's a real shame!
From the industry point of view, hand-me-down is a bug that has since been fixed, at least 50% of it. Business cannot uphold ideas when they are at odds with profit (single companies can, as long as they are not public, but business as a whole can't).
That may very well play a role. Here in former East Germany women were expected to work despite being parents which resulted in some side effects like widely available daycare / kindergartens.
Communism might have been promoting individualism, but certainly engineering professions were men-only affairs.
While there has been some regression on this coinciding with more exposure to Western culture, I still notice that there is a much higher proportion of women in Chinese tech companies than in Western ones, although not a 50-50 split.