For example, my mother had me at 18, and managed to struggle through college anyway. The reason she was even able to go to school is she had 2 sisters that could take turns babysitting me. If she had 1 sister, it wouldn't have been tenable. If she didn't have a family, same.
So she's very much aware of how difficult it was to get through college, and she readily says "if it weren't for your aunts, I would never have a degree."
I'm skeptical of this sort of claim. The sexism barriers in medicine and law were much higher, yet women persevered and achieved gender parity despite them. I don't think women are so easily deterred as you seem to imply.
That said, of course it's still worthwhile to eliminate overt sexism of the sorts described in the article, but I don't think for a second it will change the gender ratios by very much. The sort of sexism described is unfortunately everywhere.
That doesn't follow. The obstacles the women who succeeded in CS perceive aren't necessarily the same obstacles that drive women who don't succeed in or who don't pursue CS. Sometimes these will overlap, but not necessarily.
Clearly the obstacles faced by women who succeeded were insufficient to deter them, so we need to know what obstacles were successful deterrents.