No, it was clearly not his point. You, like many others, have misinterpreted what he wrote — indeed, you’ve read your own biases into it.
When he says “Women, on average, have more… Neuroticism”, he’s talking about the Big Five personality traits, and the effect is both well documented and significant (about 0.5σ). It’s simply a fact, and as far as I’m aware it’s regarded by the psychology community as uncontroversial. The point he makes about it is emphatically not that this makes someone a worse programmer* (indeed, I’d argue that in some ways the opposite might be a case—a more anxious person is more likely to worry about code quality, for instance). His point, rather, is that it might affect that person’s choices — they might choose to avoid jobs they regarded as higher stress, and they might be more likely to leave roles for which stress is a significant risk (for instance, senior roles in tech firms).
This is not, on the face of it, an unreasonable suggestion; whether it’s true or not I don’t know, but what I do know is that it isn’t a criticism of women or their ability to code.
* Of course, we must remember we’re talking statistics here, so this has no bearing on any individual.
