The author makes a lot of good points until the last paragraph: >We can’t expect more women to succeed in the startup world until we’re able to talk honestly about how much harder startups are for those who want to spend a lot of time with their kids...We’ll never reach our potential as female founders until we acknowledge that each woman’s attitude towards children is different. The idea that just "talking honestly"…
Read it again, it's phrased as being necessary but not necessarily sufficient. You're arguing it's not sufficient -- and okay, it doesn't have to be. Without a true and open reckoning of the costs of a path, people can't make good decisions about the path. Will a true and open reckoning of the costs of a path make the path one people choose? No, not on its own. But it's part of it.
Deep down I think we all agree that both startups and involving yourself in your children's lives take a lot of time and effort, and that we should respect an individual's free choice to determine what balance works for them. But many are struggling with an opposing ideal that necessarily cannot coexist. For example, by declining the CEO position, she's actively working against the ideal of having an equal number of female CEOs to male CEOs.