If she were trying to time it, this timing seems weird. This is literally the day after Grok kept posting anti-semitism, praising Hitler, and calling itself MechaHitler. This might not be the least graceful moment for an exit, but there were so many more graceful exit times.
All the race science phrenology bullshit is coming out of Silicon Valley. It's not a surprise to me that HN would be full of people "just reading the stats".