>The author displays a lack of familiarity with US startup culture: "seventy-hour weeks", "Selection biases filter out most women, underrepresented minorities, and those without connections."

For actual startups (not small established companies adopting the startup nomenclature, ig Stripe, SpaceX, pharma etc) this is true.

Also for these same startups, look at how many non white/non eastern Asian/non southeast Asian men you'll find as compared to anyone else. If you look at a medical/health services startup, you'll find slightly more women.