she says there are external factors that play a role, but the thesis of the article is that internal factors are primary and women need to do more to overcome them; her conclusion is all about how women need to take responsibility and cultivate masculine traits in girls:
But we must also be willing to name the ways in which we undermine ourselves, and to do something about it. We can start by normalizing confidence in women the same way we normalize it in men. That means celebrating ambition and leadership from an early age. It means teaching our daughters not just to be nice, but to be bold, and teaching our sons to value and respect that boldness in others, regardless of gender. Second, and perhaps more importantly, we must stop waiting until we feel 100% ready. Men rarely do. The path to excellence is not through perfection, but through trial and error. Finally, we must learn to trust ourselves. There is a quiet power in intuition, an inner voice that knows when it is time to leap. The world needs more women willing to follow that voice, wherever it leads.
It's great she acknowledges it's not all internal, and I agree the women play a role in the social factors she calls external (in that sense they are both external and internalized), and I also agree women can and should recognize internalized sexism and work against it, but I don't think that starts with adopting masculine norms like over-confidence and "ambition" ... in a sexist society, these traits are rewarded in men (she already acknowledges women with those same traits are punished for it), but the solution is to change what is valued, not to socialize everyone as men and to make that more acceptable.
The article comes across as having and underlying femmephobia, and feels a bit ignorant of how social issues work, which makes sense given her background is in physics and not the humanities.