I wonder if this is more a symptom of having few women in the field of computer science / software engineering
Women -- girls -- with talent and potential mostly leave the STEM track when they're twelve to fifteen years old. Looking for the cause of different quantities of company founders in factors that affect thirty-year-olds isn't going to address the biggest difference.
Looking at 14 year olds isn't going to help the 30 year olds who did stick with STEM and are here right now. It's great to help girls, but I have to wonder that that is so often the answer when grown women point out there are problems.
Women -- girls -- with talent and potential mostly leave the STEM track when they're twelve to fifteen years old. Looking for the cause of different quantities of company founders in factors that affect thirty-year-olds isn't going to address the biggest difference.